Merge branch 'master' into sql-composesql-compose

34 files changed, 922 insertions, 105 deletions

diff --git a/.gitignore b/.gitignore
index a017eb3..409bb3a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,3 +13,4 @@ scripts/pypi_docs_upload.py
 env
 .tox
 /rel
+/wheels
diff --git a/.travis.yml b/.travis.yml
index 1041163..4d558f1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,7 +6,7 @@ language: python
 
 python:
   - 2.7
-  - 3.6-dev
+  - 3.6
   - 2.6
   - 3.5
   - 3.4
diff --git a/NEWS b/NEWS
index ae8cf73..499656d 100644
--- a/NEWS
+++ b/NEWS
@@ -28,6 +28,14 @@ New features:
 - `~cursor.callproc()` now accepts a dictionary of parameters (:ticket:`#381`).
 - Using Python C API decoding functions and codecs caching for faster
   unicode encoding/decoding (:ticket:`#473`).
+- `~cursor.executemany()` slowness addressed by
+  `~psycopg2.extras.execute_batch()` and `~psycopg2.extras.execute_values()`
+  (:ticket:`#491`).
+- Added ``async_`` as an alias for ``async`` to support Python 3.7 where
+  ``async`` will become a keyword (:ticket:`#495`).
+
+Bug fixes:
+
 - Fixed error caused by missing decoding `~psycopg2.extras.LoggingConnection`
   (:ticket:`#483`).
 
diff --git a/doc/src/_static/psycopg.css b/doc/src/_static/psycopg.css
index a5d5b3a..8f6567b 100644
--- a/doc/src/_static/psycopg.css
+++ b/doc/src/_static/psycopg.css
@@ -1,4 +1,4 @@
-@import url("default.css");
+@import url("classic.css");
 
 blockquote {
     font-style: italic;
@@ -14,11 +14,13 @@ div.dbapi-extension {
     border: 1px solid #aaf;
 }
 
+code.sql,
 tt.sql {
     font-size: 1em;
     background-color: transparent;
 }
 
+a > code.sql:hover,
 a > tt.sql:hover {
     text-decoration: underline;
 }
diff --git a/doc/src/conf.py b/doc/src/conf.py
index a918c08..9e73308 100644
--- a/doc/src/conf.py
+++ b/doc/src/conf.py
@@ -127,7 +127,7 @@ rst_epilog = """
 
 # The theme to use for HTML and HTML Help pages.  Major themes that come with
 # Sphinx are currently 'default' and 'sphinxdoc'.
-html_theme = 'default'
+html_theme = 'classic'
 
 # The stylesheet to use with HTML output: this will include the original one
 # adding a few classes.
diff --git a/doc/src/connection.rst b/doc/src/connection.rst
index c99c8bd..0bc584c 100644
--- a/doc/src/connection.rst
+++ b/doc/src/connection.rst
@@ -706,9 +706,13 @@ The ``connection`` class
 
 
     .. attribute:: async
+                   async_
 
         Read only attribute: 1 if the connection is asynchronous, 0 otherwise.
 
+        .. versionchanged:: 2.7 added the `!async_` alias for Python versions
+            where `!async` is a keyword.
+
 
     .. method:: poll()
 
diff --git a/doc/src/cursor.rst b/doc/src/cursor.rst
index aee6b46..4161f2a 100644
--- a/doc/src/cursor.rst
+++ b/doc/src/cursor.rst
@@ -172,33 +172,38 @@ The ``cursor`` class
 
 
     .. method:: execute(operation [, parameters])
-      
+
         Prepare and execute a database operation (query or command).
 
         Parameters may be provided as sequence or mapping and will be bound to
         variables in the operation.  Variables are specified either with
         positional (``%s``) or named (:samp:`%({name})s`) placeholders. See
         :ref:`query-parameters`.
-        
+
         The method returns `!None`. If a query was executed, the returned
         values can be retrieved using |fetch*|_ methods.
 
 
     .. method:: executemany(operation, seq_of_parameters)
-      
+
         Prepare a database operation (query or command) and then execute it
         against all parameter tuples or mappings found in the sequence
         `seq_of_parameters`.
-        
+
         The function is mostly useful for commands that update the database:
         any result set returned by the query is discarded.
-        
+
         Parameters are bounded to the query using the same rules described in
         the `~cursor.execute()` method.
 
+        .. warning::
+            In its current implementation this method is not faster than
+            executing `~cursor.execute()` in a loop. For better performance
+            you can use the functions described in :ref:`fast-exec`.
+
 
     .. method:: callproc(procname [, parameters])
-            
+
         Call a stored database procedure with the given name. The sequence of
         parameters must contain one entry for each argument that the procedure
         expects. Overloaded procedures are supported. Named parameters can be
diff --git a/doc/src/extensions.rst b/doc/src/extensions.rst
index 9c5a853..8d70ba3 100644
--- a/doc/src/extensions.rst
+++ b/doc/src/extensions.rst
@@ -29,6 +29,8 @@ introspection etc.
 
     For a complete description of the class, see `connection`.
 
+    .. versionchanged:: 2.7
+        *async_* can be used as alias for *async*.
 
 .. class:: cursor(conn, name=None)
 
diff --git a/doc/src/extras.rst b/doc/src/extras.rst
index d33b8ee..5ef4223 100644
--- a/doc/src/extras.rst
+++ b/doc/src/extras.rst
@@ -974,6 +974,63 @@ converted into lists of strings.
         future versions.
 
 
+
+.. _fast-exec:
+
+Fast execution helpers
+----------------------
+
+The current implementation of `~cursor.executemany()` is (using an extremely
+charitable understatement) not particularly performing. These functions can
+be used to speed up the repeated execution of a statement againts a set of
+parameters.  By reducing the number of server roundtrips the performance can be
+`orders of magnitude better`__ than using `!executemany()`.
+
+.. __: https://github.com/psycopg/psycopg2/issues/491#issuecomment-276551038
+
+
+.. autofunction:: execute_batch
+
+    .. versionadded:: 2.7
+
+.. note::
+
+    `!execute_batch()` can be also used in conjunction with PostgreSQL
+    prepared statements using |PREPARE|_, |EXECUTE|_, |DEALLOCATE|_.
+    Instead of executing::
+
+        execute_batch(cur,
+            "big and complex SQL with %s %s params",
+            params_list)
+
+    it is possible to execute something like::
+
+        cur.execute("PREPARE stmt AS big and complex SQL with $1 $2 params")
+        execute_batch(cur, "EXECUTE stmt (%s, %s)", params_list)
+        cur.execute("DEALLOCATE stmt")
+
+    which may bring further performance benefits: if the operation to perform
+    is complex, every single execution will be faster as the query plan is
+    already cached; furthermore the amount of data to send on the server will
+    be lesser (one |EXECUTE| per param set instead of the whole, likely
+    longer, statement).
+
+    .. |PREPARE| replace:: :sql:`PREPARE`
+    .. _PREPARE: https://www.postgresql.org/docs/current/static/sql-prepare.html
+
+    .. |EXECUTE| replace:: :sql:`EXECUTE`
+    .. _EXECUTE: https://www.postgresql.org/docs/current/static/sql-execute.html
+
+    .. |DEALLOCATE| replace:: :sql:`DEALLOCATE`
+    .. _DEALLOCATE: https://www.postgresql.org/docs/current/static/sql-deallocate.html
+
+
+.. autofunction:: execute_values
+
+    .. versionadded:: 2.7
+
+
+
 .. index::
     single: Time zones; Fractional
 
diff --git a/doc/src/install.rst b/doc/src/install.rst
index 4611537..b364551 100644
--- a/doc/src/install.rst
+++ b/doc/src/install.rst
@@ -18,8 +18,8 @@ The current `!psycopg2` implementation supports:
     NOTE: keep consistent with setup.py and the /features/ page.
 
 - Python 2 versions from 2.6 to 2.7
-- Python 3 versions from 3.1 to 3.5
-- PostgreSQL server versions from 7.4 to 9.5
+- Python 3 versions from 3.1 to 3.6
+- PostgreSQL server versions from 7.4 to 9.6
 - PostgreSQL client library version from 9.1
 
 .. _PostgreSQL: http://www.postgresql.org/
diff --git a/doc/src/module.rst b/doc/src/module.rst
index 97fbdf1..2bd259e 100644
--- a/doc/src/module.rst
+++ b/doc/src/module.rst
@@ -64,7 +64,8 @@ The module interface respects the standard defined in the |DBAPI|_.
     cursors you can use this parameter instead of subclassing a connection.
 
     Using *async*\=\ `!True` an asynchronous connection will be created: see
-    :ref:`async-support` to know about advantages and limitations.
+    :ref:`async-support` to know about advantages and limitations. *async_* is
+    a valid alias for the Python version where ``async`` is a keyword.
 
     .. versionchanged:: 2.4.3
         any keyword argument is passed to the connection. Previously only the
@@ -76,6 +77,9 @@ The module interface respects the standard defined in the |DBAPI|_.
     .. versionchanged:: 2.7
         both *dsn* and keyword arguments can be specified.
 
+    .. versionchanged:: 2.7
+        added *async_* alias.
+
     .. seealso::
 
         - `~psycopg2.extensions.parse_dsn`
diff --git a/lib/__init__.py b/lib/__init__.py
index fb22b4c..492b924 100644
--- a/lib/__init__.py
+++ b/lib/__init__.py
@@ -82,8 +82,7 @@ else:
     del Decimal, Adapter
 
 
-def connect(dsn=None, connection_factory=None, cursor_factory=None,
-            async=False, **kwargs):
+def connect(dsn=None, connection_factory=None, cursor_factory=None, **kwargs):
     """
     Create a new database connection.
 
@@ -111,17 +110,24 @@ def connect(dsn=None, connection_factory=None, cursor_factory=None,
     Using the *cursor_factory* parameter, a new default cursor factory will be
     used by cursor().
 
-    Using *async*=True an asynchronous connection will be created.
+    Using *async*=True an asynchronous connection will be created. *async_* is
+    a valid alias (for Python versions where ``async`` is a keyword).
 
     Any other keyword parameter will be passed to the underlying client
     library: the list of supported parameters depends on the library version.
 
     """
+    kwasync = {}
+    if 'async' in kwargs:
+        kwasync['async'] = kwargs.pop('async')
+    if 'async_' in kwargs:
+        kwasync['async_'] = kwargs.pop('async_')
+
     if dsn is None and not kwargs:
         raise TypeError('missing dsn and no parameters')
 
     dsn = _ext.make_dsn(dsn, **kwargs)
-    conn = _connect(dsn, connection_factory=connection_factory, async=async)
+    conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
     if cursor_factory is not None:
         conn.cursor_factory = cursor_factory
 
diff --git a/lib/extras.py b/lib/extras.py
index b59a2c7..38ca17a 100644
--- a/lib/extras.py
+++ b/lib/extras.py
@@ -106,18 +106,21 @@ class DictCursorBase(_cursor):
         return res
 
     def __iter__(self):
-        if self._prefetch:
-            res = super(DictCursorBase, self).__iter__()
-            first = res.next()
-        if self._query_executed:
-            self._build_index()
-        if not self._prefetch:
-            res = super(DictCursorBase, self).__iter__()
-            first = res.next()
-
-        yield first
-        while 1:
-            yield res.next()
+        try:
+            if self._prefetch:
+                res = super(DictCursorBase, self).__iter__()
+                first = res.next()
+            if self._query_executed:
+                self._build_index()
+            if not self._prefetch:
+                res = super(DictCursorBase, self).__iter__()
+                first = res.next()
+
+            yield first
+            while 1:
+                yield res.next()
+        except StopIteration:
+            return
 
 
 class DictConnection(_connection):
@@ -343,17 +346,20 @@ class NamedTupleCursor(_cursor):
         return map(nt._make, ts)
 
     def __iter__(self):
-        it = super(NamedTupleCursor, self).__iter__()
-        t = it.next()
+        try:
+            it = super(NamedTupleCursor, self).__iter__()
+            t = it.next()
 
-        nt = self.Record
-        if nt is None:
-            nt = self.Record = self._make_nt()
+            nt = self.Record
+            if nt is None:
+                nt = self.Record = self._make_nt()
 
-        yield nt._make(t)
+            yield nt._make(t)
 
-        while 1:
-            yield nt._make(it.next())
+            while 1:
+                yield nt._make(it.next())
+        except StopIteration:
+            return
 
     try:
         from collections import namedtuple
@@ -1135,3 +1141,142 @@ def register_composite(name, conn_or_curs, globally=False, factory=None):
             caster.array_typecaster, not globally and conn_or_curs or None)
 
     return caster
+
+
+def _paginate(seq, page_size):
+    """Consume an iterable and return it in chunks.
+
+    Every chunk is at most `page_size`. Never return an empty chunk.
+    """
+    page = []
+    it = iter(seq)
+    while 1:
+        try:
+            for i in xrange(page_size):
+                page.append(it.next())
+            yield page
+            page = []
+        except StopIteration:
+            if page:
+                yield page
+            return
+
+
+def execute_batch(cur, sql, argslist, page_size=100):
+    """Execute groups of statements in fewer server roundtrips.
+
+    Execute *sql* several times, against all parameters set (sequences or
+    mappings) found in *argslist*.
+
+    The function is semantically similar to
+
+    .. parsed-literal::
+
+        *cur*\.\ `~cursor.executemany`\ (\ *sql*\ , *argslist*\ )
+
+    but has a different implementation: Psycopg will join the statements into
+    fewer multi-statement commands, each one containing at most *page_size*
+    statements, resulting in a reduced number of server roundtrips.
+
+    """
+    for page in _paginate(argslist, page_size=page_size):
+        sqls = [cur.mogrify(sql, args) for args in page]
+        cur.execute(b";".join(sqls))
+
+
+def execute_values(cur, sql, argslist, template=None, page_size=100):
+    '''Execute a statement using :sql:`VALUES` with a sequence of parameters.
+
+    :param cur: the cursor to use to execute the query.
+
+    :param sql: the query to execute. It must contain a single ``%s``
+        placeholder, which will be replaced by a `VALUES list`__.
+        Example: ``"INSERT INTO mytable (id, f1, f2) VALUES %s"``.
+
+    :param argslist: sequence of sequences or dictionaries with the arguments
+        to send to the query. The type and content must be consistent with
+        *template*.
+
+    :param template: the snippet to merge to every item in *argslist* to
+        compose the query. If *argslist* items are sequences it should contain
+        positional placeholders (e.g. ``"(%s, %s, %s)"``, or ``"(%s, %s, 42)``"
+        if there are constants value...); If *argslist* is items are mapping
+        it should contain named placeholders (e.g. ``"(%(id)s, %(f1)s, 42)"``).
+        If not specified, assume the arguments are sequence and use a simple
+        positional template (i.e.  ``(%s, %s, ...)``), with the number of
+        placeholders sniffed by the first element in *argslist*.
+
+    :param page_size: maximum number of *argslist* items to include in every
+        statement. If there are more items the function will execute more than
+        one statement.
+
+    .. __: https://www.postgresql.org/docs/current/static/queries-values.html
+
+    While :sql:`INSERT` is an obvious candidate for this function it is
+    possible to use it with other statements, for example::
+
+        >>> cur.execute(
+        ... "create table test (id int primary key, v1 int, v2 int)")
+
+        >>> execute_values(cur,
+        ... "INSERT INTO test (id, v1, v2) VALUES %s",
+        ... [(1, 2, 3), (4, 5, 6), (7, 8, 9)])
+
+        >>> execute_values(cur,
+        ... """UPDATE test SET v1 = data.v1 FROM (VALUES %s) AS data (id, v1)
+        ... WHERE test.id = data.id""",
+        ... [(1, 20), (4, 50)])
+
+        >>> cur.execute("select * from test order by id")
+        >>> cur.fetchall()
+        [(1, 20, 3), (4, 50, 6), (7, 8, 9)])
+
+    '''
+    # we can't just use sql % vals because vals is bytes: if sql is bytes
+    # there will be some decoding error because of stupid codec used, and Py3
+    # doesn't implement % on bytes.
+    if not isinstance(sql, bytes):
+        sql = sql.encode(_ext.encodings[cur.connection.encoding])
+    pre, post = _split_sql(sql)
+
+    for page in _paginate(argslist, page_size=page_size):
+        if template is None:
+            template = b'(' + b','.join([b'%s'] * len(page[0])) + b')'
+        parts = pre[:]
+        for args in page:
+            parts.append(cur.mogrify(template, args))
+            parts.append(b',')
+        parts[-1:] = post
+        cur.execute(b''.join(parts))
+
+
+def _split_sql(sql):
+    """Split *sql* on a single ``%s`` placeholder.
+
+    Split on the %s, perform %% replacement and return pre, post lists of
+    snippets.
+    """
+    curr = pre = []
+    post = []
+    tokens = _re.split(br'(%.)', sql)
+    for token in tokens:
+        if len(token) != 2 or token[:1] != b'%':
+            curr.append(token)
+            continue
+
+        if token[1:] == b's':
+            if curr is pre:
+                curr = post
+            else:
+                raise ValueError(
+                    "the query contains more than one '%s' placeholder")
+        elif token[1:] == b'%':
+            curr.append(b'%')
+        else:
+            raise ValueError("unsupported format character: '%s'"
+                % token[1:].decode('ascii', 'replace'))
+
+    if curr is pre:
+        raise ValueError("the query doesn't contain any '%s' placeholder")
+
+    return pre, post
diff --git a/psycopg/connection_type.c b/psycopg/connection_type.c
index 7401bc1..2066579 100644
--- a/psycopg/connection_type.c
+++ b/psycopg/connection_type.c
@@ -1040,6 +1040,8 @@ static struct PyMemberDef connectionObject_members[] = {
         "The current connection string."},
     {"async", T_LONG, offsetof(connectionObject, async), READONLY,
         "True if the connection is asynchronous."},
+    {"async_", T_LONG, offsetof(connectionObject, async), READONLY,
+        "True if the connection is asynchronous."},
     {"status", T_INT,
         offsetof(connectionObject, status), READONLY,
         "The current transaction status."},
@@ -1186,12 +1188,14 @@ static int
 connection_init(PyObject *obj, PyObject *args, PyObject *kwds)
 {
     const char *dsn;
-    long int async = 0;
-    static char *kwlist[] = {"dsn", "async", NULL};
+    long int async = 0, async_ = 0;
+    static char *kwlist[] = {"dsn", "async", "async_", NULL};
 
-    if (!PyArg_ParseTupleAndKeywords(args, kwds, "s|l", kwlist, &dsn, &async))
+    if (!PyArg_ParseTupleAndKeywords(args, kwds, "s|ll", kwlist,
+            &dsn, &async, &async_))
         return -1;
 
+    if (async_) { async = async_; }
     return connection_setup((connectionObject *)obj, dsn, async);
 }
 
diff --git a/psycopg/psycopgmodule.c b/psycopg/psycopgmodule.c
index c4d1517..6c95bd6 100644
--- a/psycopg/psycopgmodule.c
+++ b/psycopg/psycopgmodule.c
@@ -82,15 +82,17 @@ psyco_connect(PyObject *self, PyObject *args, PyObject *keywds)
     PyObject *conn = NULL;
     PyObject *factory = NULL;
     const char *dsn = NULL;
-    int async = 0;
+    int async = 0, async_ = 0;
 
-    static char *kwlist[] = {"dsn", "connection_factory", "async", NULL};
+    static char *kwlist[] = {"dsn", "connection_factory", "async", "async_", NULL};
 
-    if (!PyArg_ParseTupleAndKeywords(args, keywds, "s|Oi", kwlist,
-                                     &dsn, &factory, &async)) {
+    if (!PyArg_ParseTupleAndKeywords(args, keywds, "s|Oii", kwlist,
+            &dsn, &factory, &async, &async_)) {
         return NULL;
     }
 
+    if (async_) { async = async_; }
+
     Dprintf("psyco_connect: dsn = '%s', async = %d", dsn, async);
 
     /* allocate connection, fill with errors and return it */
diff --git a/scripts/build-manylinux.sh b/scripts/build-manylinux.sh
new file mode 100755
index 0000000..e1bdd91
--- /dev/null
+++ b/scripts/build-manylinux.sh
@@ -0,0 +1,50 @@
+#!/bin/bash
+
+# Create manylinux1 wheels for psycopg2
+#
+# Run this script with something like:
+#
+# docker run --rm -v `pwd`:/psycopg2 quay.io/pypa/manylinux1_x86_64 /psycopg2/scripts/build-manylinux.sh
+# docker run --rm -v `pwd`:/psycopg2 quay.io/pypa/manylinux1_i686 linux32 /psycopg2/scripts/build-manylinux.sh
+#
+# Tests run against a postgres on the host. Use -e PSYCOPG_TESTDB_USER=... etc
+# to configure tests run.
+
+set -e -x
+
+# Install postgres packages for build and testing
+# This doesn't work:
+# rpm -Uvh "http://yum.postgresql.org/9.5/redhat/rhel-5-x86_64/pgdg-redhat95-9.5-3.noarch.rpm"
+wget -O "/tmp/pgdg.rpm" "https://download.postgresql.org/pub/repos/yum/9.5/redhat/rhel-5-x86_64/pgdg-centos95-9.5-3.noarch.rpm"
+rpm -Uv "/tmp/pgdg.rpm"
+yum install -y postgresql95-devel
+
+# Make pg_config available
+export PGPATH=/usr/pgsql-9.5/bin/
+export PATH="$PGPATH:$PATH"
+
+# Find psycopg version
+export VERSION=$(grep -e ^PSYCOPG_VERSION /psycopg2/setup.py | sed "s/.*'\(.*\)'/\1/")
+export WHEELSDIR="/psycopg2/wheels/psycopg2-$VERSION"
+
+# Create the wheel packages
+for PYBIN in /opt/python/*/bin; do
+    "${PYBIN}/pip" wheel /psycopg2/ -w "$WHEELSDIR"
+done
+
+# Bundle external shared libraries into the wheels
+for WHL in "$WHEELSDIR"/*.whl; do
+    auditwheel repair "$WHL" -w "$WHEELSDIR"
+done
+
+# Make sure libpq is not in the system
+yum remove -y postgresql95-devel
+
+# Connect to the host to test. Use 'docker -e' to pass other variables
+export PSYCOPG2_TESTDB_HOST=$(ip route show | awk '/default/ {print $3}')
+
+# Install packages and test
+for PYBIN in /opt/python/*/bin; do
+    "${PYBIN}/pip" install psycopg2 --no-index -f "$WHEELSDIR"
+    "${PYBIN}/python" -c "from psycopg2 import tests; tests.unittest.main(defaultTest='tests.test_suite')"
+done
diff --git a/setup.py b/setup.py
index c106525..d251f98 100644
--- a/setup.py
+++ b/setup.py
@@ -50,7 +50,11 @@ else:
         # workaround subclass for ticket #153
         pass
 
-    sys.path.insert(0, 'scripts')
+    # Configure distutils to run our custom 2to3 fixers as well
+    from lib2to3.refactor import get_fixers_from_package
+    build_py.fixer_names = [f for f in get_fixers_from_package('lib2to3.fixes')
+        # creates a pending deprecation warning on py 3.4
+        if not f.endswith('.fix_reload')]
 
 try:
     import configparser
@@ -79,6 +83,7 @@ Programming Language :: Python :: 3.2
 Programming Language :: Python :: 3.3
 Programming Language :: Python :: 3.4
 Programming Language :: Python :: 3.5
+Programming Language :: Python :: 3.6
 Programming Language :: C
 Programming Language :: SQL
 Topic :: Database
diff --git a/tests/__init__.py b/tests/__init__.py
index 95f5b9d..85a4ec9 100755
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -22,6 +22,11 @@
 # FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
 # License for more details.
 
+# Convert warnings into errors here. We can't do it with -W because on
+# Travis importing site raises a warning.
+import warnings
+warnings.simplefilter('error')  # noqa
+
 import sys
 from testconfig import dsn
 from testutils import unittest
@@ -36,6 +41,7 @@ import test_cursor
 import test_dates
 import test_errcodes
 import test_extras_dictcursor
+import test_fast_executemany
 import test_green
 import test_ipaddress
 import test_lobject
@@ -50,6 +56,9 @@ import test_types_basic
 import test_types_extras
 import test_with
 
+if sys.version_info[:2] < (3, 6):
+    import test_async_keyword
+
 
 def test_suite():
     # If connection to test db fails, bail out early.
@@ -65,6 +74,8 @@ def test_suite():
 
     suite = unittest.TestSuite()
     suite.addTest(test_async.test_suite())
+    if sys.version_info[:2] < (3, 6):
+        suite.addTest(test_async_keyword.test_suite())
     suite.addTest(test_bugX000.test_suite())
     suite.addTest(test_bug_gc.test_suite())
     suite.addTest(test_cancel.test_suite())
@@ -74,6 +85,7 @@ def test_suite():
     suite.addTest(test_dates.test_suite())
     suite.addTest(test_errcodes.test_suite())
     suite.addTest(test_extras_dictcursor.test_suite())
+    suite.addTest(test_fast_executemany.test_suite())
     suite.addTest(test_green.test_suite())
     suite.addTest(test_ipaddress.test_suite())
     suite.addTest(test_lobject.test_suite())
diff --git a/tests/test_async.py b/tests/test_async.py
index 6f8fed5..63a5513 100755
--- a/tests/test_async.py
+++ b/tests/test_async.py
@@ -23,7 +23,7 @@
 # FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
 # License for more details.
 
-from testutils import unittest, skip_before_postgres
+from testutils import unittest, skip_before_postgres, slow
 
 import psycopg2
 from psycopg2 import extensions
@@ -55,7 +55,7 @@ class AsyncTests(ConnectingTestCase):
         ConnectingTestCase.setUp(self)
 
         self.sync_conn = self.conn
-        self.conn = self.connect(async=True)
+        self.conn = self.connect(async_=True)
 
         self.wait(self.conn)
 
@@ -71,8 +71,8 @@ class AsyncTests(ConnectingTestCase):
         sync_cur = self.sync_conn.cursor()
         del cur, sync_cur
 
-        self.assert_(self.conn.async)
-        self.assert_(not self.sync_conn.async)
+        self.assert_(self.conn.async_)
+        self.assert_(not self.sync_conn.async_)
 
         # the async connection should be in isolevel 0
         self.assertEquals(self.conn.isolation_level, 0)
@@ -97,6 +97,7 @@ class AsyncTests(ConnectingTestCase):
         self.assertFalse(self.conn.isexecuting())
         self.assertEquals(cur.fetchone()[0], "a")
 
+    @slow
     @skip_before_postgres(8, 2)
     def test_async_callproc(self):
         cur = self.conn.cursor()
@@ -107,6 +108,7 @@ class AsyncTests(ConnectingTestCase):
         self.assertFalse(self.conn.isexecuting())
         self.assertEquals(cur.fetchall()[0][0], '')
 
+    @slow
     def test_async_after_async(self):
         cur = self.conn.cursor()
         cur2 = self.conn.cursor()
@@ -310,14 +312,15 @@ class AsyncTests(ConnectingTestCase):
 
     def test_async_subclass(self):
         class MyConn(psycopg2.extensions.connection):
-            def __init__(self, dsn, async=0):
-                psycopg2.extensions.connection.__init__(self, dsn, async=async)
+            def __init__(self, dsn, async_=0):
+                psycopg2.extensions.connection.__init__(self, dsn, async_=async_)
 
-        conn = self.connect(connection_factory=MyConn, async=True)
+        conn = self.connect(connection_factory=MyConn, async_=True)
         self.assert_(isinstance(conn, MyConn))
-        self.assert_(conn.async)
+        self.assert_(conn.async_)
         conn.close()
 
+    @slow
     def test_flush_on_write(self):
         # a very large query requires a flush loop to be sent to the backend
         curs = self.conn.cursor()
@@ -438,7 +441,7 @@ class AsyncTests(ConnectingTestCase):
 
     def test_async_connection_error_message(self):
         try:
-            cnn = psycopg2.connect('dbname=thisdatabasedoesntexist', async=True)
+            cnn = psycopg2.connect('dbname=thisdatabasedoesntexist', async_=True)
             self.wait(cnn)
         except psycopg2.Error, e:
             self.assertNotEqual(str(e), "asynchronous connection failed",
diff --git a/tests/test_async_keyword.py b/tests/test_async_keyword.py
new file mode 100755
index 0000000..3b20e8d
--- /dev/null
+++ b/tests/test_async_keyword.py
@@ -0,0 +1,217 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# test_async_keyword.py - test for objects using 'async' as attribute/param
+#
+# Copyright (C) 2017 Daniele Varrazzo  <daniele.varrazzo@gmail.com>
+#
+# psycopg2 is free software: you can redistribute it and/or modify it
+# under the terms of the GNU Lesser General Public License as published
+# by the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# In addition, as a special exception, the copyright holders give
+# permission to link this program with the OpenSSL library (or with
+# modified versions of OpenSSL that use the same license as OpenSSL),
+# and distribute linked combinations including the two.
+#
+# You must obey the GNU Lesser General Public License in all respects for
+# all of the code used other than OpenSSL.
+#
+# psycopg2 is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+# License for more details.
+
+import psycopg2
+from psycopg2 import extras
+
+from testconfig import dsn
+from testutils import (ConnectingTestCase, unittest, skip_before_postgres,
+    assertDsnEqual)
+from test_replication import ReplicationTestCase, skip_repl_if_green
+from psycopg2.extras import LogicalReplicationConnection, StopReplication
+
+
+class AsyncTests(ConnectingTestCase):
+    def setUp(self):
+        ConnectingTestCase.setUp(self)
+
+        self.sync_conn = self.conn
+        self.conn = self.connect(async=True)
+
+        self.wait(self.conn)
+
+        curs = self.conn.cursor()
+        curs.execute('''
+            CREATE TEMPORARY TABLE table1 (
+              id int PRIMARY KEY
+            )''')
+        self.wait(curs)
+
+    def test_connection_setup(self):
+        cur = self.conn.cursor()
+        sync_cur = self.sync_conn.cursor()
+        del cur, sync_cur
+
+        self.assert_(self.conn.async)
+        self.assert_(not self.sync_conn.async)
+
+        # the async connection should be in isolevel 0
+        self.assertEquals(self.conn.isolation_level, 0)
+
+        # check other properties to be found on the connection
+        self.assert_(self.conn.server_version)
+        self.assert_(self.conn.protocol_version in (2, 3))
+        self.assert_(self.conn.encoding in psycopg2.extensions.encodings)
+
+    def test_async_subclass(self):
+        class MyConn(psycopg2.extensions.connection):
+            def __init__(self, dsn, async=0):
+                psycopg2.extensions.connection.__init__(self, dsn, async=async)
+
+        conn = self.connect(connection_factory=MyConn, async=True)
+        self.assert_(isinstance(conn, MyConn))
+        self.assert_(conn.async)
+        conn.close()
+
+    def test_async_connection_error_message(self):
+        try:
+            cnn = psycopg2.connect('dbname=thisdatabasedoesntexist', async=True)
+            self.wait(cnn)
+        except psycopg2.Error, e:
+            self.assertNotEqual(str(e), "asynchronous connection failed",
+                "connection error reason lost")
+        else:
+            self.fail("no exception raised")
+
+
+class CancelTests(ConnectingTestCase):
+    def setUp(self):
+        ConnectingTestCase.setUp(self)
+
+        cur = self.conn.cursor()
+        cur.execute('''
+            CREATE TEMPORARY TABLE table1 (
+              id int PRIMARY KEY
+            )''')
+        self.conn.commit()
+
+    @skip_before_postgres(8, 2)
+    def test_async_cancel(self):
+        async_conn = psycopg2.connect(dsn, async=True)
+        self.assertRaises(psycopg2.OperationalError, async_conn.cancel)
+        extras.wait_select(async_conn)
+        cur = async_conn.cursor()
+        cur.execute("select pg_sleep(10000)")
+        self.assertTrue(async_conn.isexecuting())
+        async_conn.cancel()
+        self.assertRaises(psycopg2.extensions.QueryCanceledError,
+                          extras.wait_select, async_conn)
+        cur.execute("select 1")
+        extras.wait_select(async_conn)
+        self.assertEqual(cur.fetchall(), [(1, )])
+
+    def test_async_connection_cancel(self):
+        async_conn = psycopg2.connect(dsn, async=True)
+        async_conn.close()
+        self.assertTrue(async_conn.closed)
+
+
+class ConnectTestCase(unittest.TestCase):
+    def setUp(self):
+        self.args = None
+
+        def connect_stub(dsn, connection_factory=None, async=False):
+            self.args = (dsn, connection_factory, async)
+
+        self._connect_orig = psycopg2._connect
+        psycopg2._connect = connect_stub
+
+    def tearDown(self):
+        psycopg2._connect = self._connect_orig
+
+    def test_there_has_to_be_something(self):
+        self.assertRaises(TypeError, psycopg2.connect)
+        self.assertRaises(TypeError, psycopg2.connect,
+            connection_factory=lambda dsn, async=False: None)
+        self.assertRaises(TypeError, psycopg2.connect,
+            async=True)
+
+    def test_factory(self):
+        def f(dsn, async=False):
+            pass
+
+        psycopg2.connect(database='foo', host='baz', connection_factory=f)
+        assertDsnEqual(self, self.args[0], 'dbname=foo host=baz')
+        self.assertEqual(self.args[1], f)
+        self.assertEqual(self.args[2], False)
+
+        psycopg2.connect("dbname=foo host=baz", connection_factory=f)
+        assertDsnEqual(self, self.args[0], 'dbname=foo host=baz')
+        self.assertEqual(self.args[1], f)
+        self.assertEqual(self.args[2], False)
+
+    def test_async(self):
+        psycopg2.connect(database='foo', host='baz', async=1)
+        assertDsnEqual(self, self.args[0], 'dbname=foo host=baz')
+        self.assertEqual(self.args[1], None)
+        self.assert_(self.args[2])
+
+        psycopg2.connect("dbname=foo host=baz", async=True)
+        assertDsnEqual(self, self.args[0], 'dbname=foo host=baz')
+        self.assertEqual(self.args[1], None)
+        self.assert_(self.args[2])
+
+
+class AsyncReplicationTest(ReplicationTestCase):
+    @skip_before_postgres(9, 4)     # slots require 9.4
+    @skip_repl_if_green
+    def test_async_replication(self):
+        conn = self.repl_connect(
+            connection_factory=LogicalReplicationConnection, async=1)
+        if conn is None:
+            return
+
+        cur = conn.cursor()
+
+        self.create_replication_slot(cur, output_plugin='test_decoding')
+        self.wait(cur)
+
+        cur.start_replication(self.slot)
+        self.wait(cur)
+
+        self.make_replication_events()
+
+        self.msg_count = 0
+
+        def consume(msg):
+            # just check the methods
+            "%s: %s" % (cur.io_timestamp, repr(msg))
+
+            self.msg_count += 1
+            if self.msg_count > 3:
+                cur.send_feedback(reply=True)
+                raise StopReplication()
+
+            cur.send_feedback(flush_lsn=msg.data_start)
+
+        # cannot be used in asynchronous mode
+        self.assertRaises(psycopg2.ProgrammingError, cur.consume_stream, consume)
+
+        def process_stream():
+            from select import select
+            while True:
+                msg = cur.read_message()
+                if msg:
+                    consume(msg)
+                else:
+                    select([cur], [], [])
+        self.assertRaises(StopReplication, process_stream)
+
+
+def test_suite():
+    return unittest.TestLoader().loadTestsFromName(__name__)
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/tests/test_cancel.py b/tests/test_cancel.py
index a8eb750..3a94e5f 100755
--- a/tests/test_cancel.py
+++ b/tests/test_cancel.py
@@ -30,7 +30,7 @@ import psycopg2.extensions
 from psycopg2 import extras
 
 from testconfig import dsn
-from testutils import unittest, ConnectingTestCase, skip_before_postgres
+from testutils import unittest, ConnectingTestCase, skip_before_postgres, slow
 
 
 class CancelTests(ConnectingTestCase):
@@ -48,6 +48,7 @@ class CancelTests(ConnectingTestCase):
     def test_empty_cancel(self):
         self.conn.cancel()
 
+    @slow
     @skip_before_postgres(8, 2)
     def test_cancel(self):
         errors = []
@@ -87,7 +88,7 @@ class CancelTests(ConnectingTestCase):
 
     @skip_before_postgres(8, 2)
     def test_async_cancel(self):
-        async_conn = psycopg2.connect(dsn, async=True)
+        async_conn = psycopg2.connect(dsn, async_=True)
         self.assertRaises(psycopg2.OperationalError, async_conn.cancel)
         extras.wait_select(async_conn)
         cur = async_conn.cursor()
@@ -101,7 +102,7 @@ class CancelTests(ConnectingTestCase):
         self.assertEqual(cur.fetchall(), [(1, )])
 
     def test_async_connection_cancel(self):
-        async_conn = psycopg2.connect(dsn, async=True)
+        async_conn = psycopg2.connect(dsn, async_=True)
         async_conn.close()
         self.assertTrue(async_conn.closed)
 
diff --git a/tests/test_connection.py b/tests/test_connection.py
index 833751b..ea8b8f5 100755
--- a/tests/test_connection.py
+++ b/tests/test_connection.py
@@ -33,9 +33,9 @@ import psycopg2.errorcodes
 from psycopg2 import extensions as ext
 
 from testutils import (
-    unittest, decorate_all_tests, skip_if_no_superuser,
+    unittest, assertDsnEqual, decorate_all_tests, skip_if_no_superuser,
     skip_before_postgres, skip_after_postgres, skip_before_libpq,
-    ConnectingTestCase, skip_if_tpc_disabled, skip_if_windows)
+    ConnectingTestCase, skip_if_tpc_disabled, skip_if_windows, slow)
 
 from testconfig import dsn, dbname
 
@@ -125,6 +125,7 @@ class ConnectionTests(ConnectingTestCase):
         self.assert_('table3' in conn.notices[2])
         self.assert_('table4' in conn.notices[3])
 
+    @slow
     def test_notices_limited(self):
         conn = self.conn
         cur = conn.cursor()
@@ -138,6 +139,7 @@ class ConnectionTests(ConnectingTestCase):
         self.assertEqual(50, len(conn.notices))
         self.assert_('table99' in conn.notices[-1], conn.notices[-1])
 
+    @slow
     def test_notices_deque(self):
         from collections import deque
 
@@ -196,6 +198,7 @@ class ConnectionTests(ConnectingTestCase):
         self.assertRaises(psycopg2.NotSupportedError,
             cnn.xid, 42, "foo", "bar")
 
+    @slow
     @skip_before_postgres(8, 2)
     def test_concurrent_execution(self):
         def slave():
@@ -246,6 +249,7 @@ class ConnectionTests(ConnectingTestCase):
         gc.collect()
         self.assert_(w() is None)
 
+    @slow
     def test_commit_concurrency(self):
         # The problem is the one reported in ticket #103. Because of bad
         # status check, we commit even when a commit is already on its way.
@@ -392,9 +396,6 @@ class ParseDsnTestCase(ConnectingTestCase):
 
 
 class MakeDsnTestCase(ConnectingTestCase):
-    def assertDsnEqual(self, dsn1, dsn2):
-        self.assertEqual(set(dsn1.split()), set(dsn2.split()))
-
     def test_empty_arguments(self):
         self.assertEqual(ext.make_dsn(), '')
 
@@ -412,7 +413,7 @@ class MakeDsnTestCase(ConnectingTestCase):
 
     def test_empty_param(self):
         dsn = ext.make_dsn(dbname='sony', password='')
-        self.assertDsnEqual(dsn, "dbname=sony password=''")
+        assertDsnEqual(self, dsn, "dbname=sony password=''")
 
     def test_escape(self):
         dsn = ext.make_dsn(dbname='hello world')
@@ -435,10 +436,10 @@ class MakeDsnTestCase(ConnectingTestCase):
 
     def test_params_merging(self):
         dsn = ext.make_dsn('dbname=foo host=bar', host='baz')
-        self.assertDsnEqual(dsn, 'dbname=foo host=baz')
+        assertDsnEqual(self, dsn, 'dbname=foo host=baz')
 
         dsn = ext.make_dsn('dbname=foo', user='postgres')
-        self.assertDsnEqual(dsn, 'dbname=foo user=postgres')
+        assertDsnEqual(self, dsn, 'dbname=foo user=postgres')
 
     def test_no_dsn_munging(self):
         dsnin = 'dbname=a host=b user=c password=d'
@@ -452,7 +453,7 @@ class MakeDsnTestCase(ConnectingTestCase):
         self.assertEqual(dsn, url)
 
         dsn = ext.make_dsn(url, application_name='woot')
-        self.assertDsnEqual(dsn,
+        assertDsnEqual(self, dsn,
             'dbname=test user=tester password=secret application_name=woot')
 
         self.assertRaises(psycopg2.ProgrammingError,
@@ -899,6 +900,7 @@ class ConnectionTwoPhaseTests(ConnectingTestCase):
             (dbname,))
         self.assertEqual('42_Z3RyaWQ=_YnF1YWw=', cur.fetchone()[0])
 
+    @slow
     def test_xid_roundtrip(self):
         for fid, gtrid, bqual in [
             (0, "", ""),
@@ -921,6 +923,7 @@ class ConnectionTwoPhaseTests(ConnectingTestCase):
 
             cnn.tpc_rollback(xid)
 
+    @slow
     def test_unparsed_roundtrip(self):
         for tid in [
             '',
diff --git a/tests/test_copy.py b/tests/test_copy.py
index ac42c98..3aa509b 100755
--- a/tests/test_copy.py
+++ b/tests/test_copy.py
@@ -24,8 +24,8 @@
 
 import sys
 import string
-from testutils import unittest, ConnectingTestCase, decorate_all_tests
-from testutils import skip_if_no_iobase, skip_before_postgres
+from testutils import (unittest, ConnectingTestCase, decorate_all_tests,
+    skip_if_no_iobase, skip_before_postgres, slow)
 from cStringIO import StringIO
 from itertools import cycle, izip
 from subprocess import Popen, PIPE
@@ -77,6 +77,7 @@ class CopyTests(ConnectingTestCase):
               data text
             )''')
 
+    @slow
     def test_copy_from(self):
         curs = self.conn.cursor()
         try:
@@ -84,6 +85,7 @@ class CopyTests(ConnectingTestCase):
         finally:
             curs.close()
 
+    @slow
     def test_copy_from_insane_size(self):
         # Trying to trigger a "would block" error
         curs = self.conn.cursor()
@@ -120,6 +122,7 @@ class CopyTests(ConnectingTestCase):
         self.assertRaises(ZeroDivisionError,
             curs.copy_from, MinimalRead(f), "tcopy", columns=cols())
 
+    @slow
     def test_copy_to(self):
         curs = self.conn.cursor()
         try:
@@ -309,6 +312,7 @@ class CopyTests(ConnectingTestCase):
             curs.copy_from, StringIO('aaa\nbbb\nccc\n'), 'tcopy')
         self.assertEqual(curs.rowcount, -1)
 
+    @slow
     def test_copy_from_segfault(self):
         # issue #219
         script = ("""\
@@ -327,6 +331,7 @@ conn.close()
         proc.communicate()
         self.assertEqual(0, proc.returncode)
 
+    @slow
     def test_copy_to_segfault(self):
         # issue #219
         script = ("""\
diff --git a/tests/test_cursor.py b/tests/test_cursor.py
index fc924c4..a8fedcc 100755
--- a/tests/test_cursor.py
+++ b/tests/test_cursor.py
@@ -26,8 +26,8 @@ import time
 import pickle
 import psycopg2
 import psycopg2.extensions
-from testutils import unittest, ConnectingTestCase, skip_before_postgres
-from testutils import skip_if_no_namedtuple, skip_if_no_getrefcount
+from testutils import (unittest, ConnectingTestCase, skip_before_postgres,
+    skip_if_no_namedtuple, skip_if_no_getrefcount, slow)
 
 
 class CursorTests(ConnectingTestCase):
@@ -331,6 +331,7 @@ class CursorTests(ConnectingTestCase):
         curs.scroll(2)
         self.assertRaises(psycopg2.OperationalError, curs.scroll, -1)
 
+    @slow
     @skip_before_postgres(8, 2)
     def test_iter_named_cursor_efficient(self):
         curs = self.conn.cursor('tmp')
diff --git a/tests/test_errcodes.py b/tests/test_errcodes.py
index 6865194..4848a76 100755
--- a/tests/test_errcodes.py
+++ b/tests/test_errcodes.py
@@ -22,18 +22,22 @@
 # FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
 # License for more details.
 
-from testutils import unittest, ConnectingTestCase
+from testutils import unittest, ConnectingTestCase, slow
 
 try:
     reload
 except NameError:
-    from imp import reload
+    try:
+        from importlib import reload
+    except ImportError:
+        from imp import reload
 
 from threading import Thread
 from psycopg2 import errorcodes
 
 
 class ErrocodeTests(ConnectingTestCase):
+    @slow
     def test_lookup_threadsafe(self):
 
         # Increase if it does not fail with KeyError
diff --git a/tests/test_fast_executemany.py b/tests/test_fast_executemany.py
new file mode 100755
index 0000000..9222274
--- /dev/null
+++ b/tests/test_fast_executemany.py
@@ -0,0 +1,237 @@
+#!/usr/bin/env python
+#
+# test_fast_executemany.py - tests for fast executemany implementations
+#
+# Copyright (C) 2017 Daniele Varrazzo  <daniele.varrazzo@gmail.com>
+#
+# psycopg2 is free software: you can redistribute it and/or modify it
+# under the terms of the GNU Lesser General Public License as published
+# by the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# psycopg2 is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+# License for more details.
+
+import unittest
+from datetime import date
+
+from testutils import ConnectingTestCase
+
+import psycopg2
+import psycopg2.extras
+import psycopg2.extensions as ext
+
+
+class TestPaginate(unittest.TestCase):
+    def test_paginate(self):
+        def pag(seq):
+            return psycopg2.extras._paginate(seq, 100)
+
+        self.assertEqual(list(pag([])), [])
+        self.assertEqual(list(pag([1])), [[1]])
+        self.assertEqual(list(pag(range(99))), [list(range(99))])
+        self.assertEqual(list(pag(range(100))), [list(range(100))])
+        self.assertEqual(list(pag(range(101))), [list(range(100)), [100]])
+        self.assertEqual(
+            list(pag(range(200))), [list(range(100)), list(range(100, 200))])
+        self.assertEqual(
+            list(pag(range(1000))),
+            [list(range(i * 100, (i + 1) * 100)) for i in range(10)])
+
+
+class FastExecuteTestMixin(object):
+    def setUp(self):
+        super(FastExecuteTestMixin, self).setUp()
+        cur = self.conn.cursor()
+        cur.execute("""create table testfast (
+            id serial primary key, date date, val int, data text)""")
+
+
+class TestExecuteBatch(FastExecuteTestMixin, ConnectingTestCase):
+    def test_empty(self):
+        cur = self.conn.cursor()
+        psycopg2.extras.execute_batch(cur,
+            "insert into testfast (id, val) values (%s, %s)",
+            [])
+        cur.execute("select * from testfast order by id")
+        self.assertEqual(cur.fetchall(), [])
+
+    def test_one(self):
+        cur = self.conn.cursor()
+        psycopg2.extras.execute_batch(cur,
+            "insert into testfast (id, val) values (%s, %s)",
+            iter([(1, 10)]))
+        cur.execute("select id, val from testfast order by id")
+        self.assertEqual(cur.fetchall(), [(1, 10)])
+
+    def test_tuples(self):
+        cur = self.conn.cursor()
+        psycopg2.extras.execute_batch(cur,
+            "insert into testfast (id, date, val) values (%s, %s, %s)",
+            ((i, date(2017, 1, i + 1), i * 10) for i in range(10)))
+        cur.execute("select id, date, val from testfast order by id")
+        self.assertEqual(cur.fetchall(),
+            [(i, date(2017, 1, i + 1), i * 10) for i in range(10)])
+
+    def test_many(self):
+        cur = self.conn.cursor()
+        psycopg2.extras.execute_batch(cur,
+            "insert into testfast (id, val) values (%s, %s)",
+            ((i, i * 10) for i in range(1000)))
+        cur.execute("select id, val from testfast order by id")
+        self.assertEqual(cur.fetchall(), [(i, i * 10) for i in range(1000)])
+
+    def test_pages(self):
+        cur = self.conn.cursor()
+        psycopg2.extras.execute_batch(cur,
+            "insert into testfast (id, val) values (%s, %s)",
+            ((i, i * 10) for i in range(25)),
+            page_size=10)
+
+        # last command was 5 statements
+        self.assertEqual(sum(c == u';' for c in cur.query.decode('ascii')), 4)
+
+        cur.execute("select id, val from testfast order by id")
+        self.assertEqual(cur.fetchall(), [(i, i * 10) for i in range(25)])
+
+    def test_unicode(self):
+        cur = self.conn.cursor()
+        ext.register_type(ext.UNICODE, cur)
+        snowman = u"\u2603"
+
+        # unicode in statement
+        psycopg2.extras.execute_batch(cur,
+            "insert into testfast (id, data) values (%%s, %%s) -- %s" % snowman,
+            [(1, 'x')])
+        cur.execute("select id, data from testfast where id = 1")
+        self.assertEqual(cur.fetchone(), (1, 'x'))
+
+        # unicode in data
+        psycopg2.extras.execute_batch(cur,
+            "insert into testfast (id, data) values (%s, %s)",
+            [(2, snowman)])
+        cur.execute("select id, data from testfast where id = 2")
+        self.assertEqual(cur.fetchone(), (2, snowman))
+
+        # unicode in both
+        psycopg2.extras.execute_batch(cur,
+            "insert into testfast (id, data) values (%%s, %%s) -- %s" % snowman,
+            [(3, snowman)])
+        cur.execute("select id, data from testfast where id = 3")
+        self.assertEqual(cur.fetchone(), (3, snowman))
+
+
+class TestExecuteValuse(FastExecuteTestMixin, ConnectingTestCase):
+    def test_empty(self):
+        cur = self.conn.cursor()
+        psycopg2.extras.execute_values(cur,
+            "insert into testfast (id, val) values %s",
+            [])
+        cur.execute("select * from testfast order by id")
+        self.assertEqual(cur.fetchall(), [])
+
+    def test_one(self):
+        cur = self.conn.cursor()
+        psycopg2.extras.execute_values(cur,
+            "insert into testfast (id, val) values %s",
+            iter([(1, 10)]))
+        cur.execute("select id, val from testfast order by id")
+        self.assertEqual(cur.fetchall(), [(1, 10)])
+
+    def test_tuples(self):
+        cur = self.conn.cursor()
+        psycopg2.extras.execute_values(cur,
+            "insert into testfast (id, date, val) values %s",
+            ((i, date(2017, 1, i + 1), i * 10) for i in range(10)))
+        cur.execute("select id, date, val from testfast order by id")
+        self.assertEqual(cur.fetchall(),
+            [(i, date(2017, 1, i + 1), i * 10) for i in range(10)])
+
+    def test_dicts(self):
+        cur = self.conn.cursor()
+        psycopg2.extras.execute_values(cur,
+            "insert into testfast (id, date, val) values %s",
+            (dict(id=i, date=date(2017, 1, i + 1), val=i * 10, foo="bar")
+                for i in range(10)),
+            template='(%(id)s, %(date)s, %(val)s)')
+        cur.execute("select id, date, val from testfast order by id")
+        self.assertEqual(cur.fetchall(),
+            [(i, date(2017, 1, i + 1), i * 10) for i in range(10)])
+
+    def test_many(self):
+        cur = self.conn.cursor()
+        psycopg2.extras.execute_values(cur,
+            "insert into testfast (id, val) values %s",
+            ((i, i * 10) for i in range(1000)))
+        cur.execute("select id, val from testfast order by id")
+        self.assertEqual(cur.fetchall(), [(i, i * 10) for i in range(1000)])
+
+    def test_pages(self):
+        cur = self.conn.cursor()
+        psycopg2.extras.execute_values(cur,
+            "insert into testfast (id, val) values %s",
+            ((i, i * 10) for i in range(25)),
+            page_size=10)
+
+        # last statement was 5 tuples (one parens is for the fields list)
+        self.assertEqual(sum(c == '(' for c in cur.query.decode('ascii')), 6)
+
+        cur.execute("select id, val from testfast order by id")
+        self.assertEqual(cur.fetchall(), [(i, i * 10) for i in range(25)])
+
+    def test_unicode(self):
+        cur = self.conn.cursor()
+        ext.register_type(ext.UNICODE, cur)
+        snowman = u"\u2603"
+
+        # unicode in statement
+        psycopg2.extras.execute_values(cur,
+            "insert into testfast (id, data) values %%s -- %s" % snowman,
+            [(1, 'x')])
+        cur.execute("select id, data from testfast where id = 1")
+        self.assertEqual(cur.fetchone(), (1, 'x'))
+
+        # unicode in data
+        psycopg2.extras.execute_values(cur,
+            "insert into testfast (id, data) values %s",
+            [(2, snowman)])
+        cur.execute("select id, data from testfast where id = 2")
+        self.assertEqual(cur.fetchone(), (2, snowman))
+
+        # unicode in both
+        psycopg2.extras.execute_values(cur,
+            "insert into testfast (id, data) values %%s -- %s" % snowman,
+            [(3, snowman)])
+        cur.execute("select id, data from testfast where id = 3")
+        self.assertEqual(cur.fetchone(), (3, snowman))
+
+    def test_invalid_sql(self):
+        cur = self.conn.cursor()
+        self.assertRaises(ValueError, psycopg2.extras.execute_values, cur,
+            "insert", [])
+        self.assertRaises(ValueError, psycopg2.extras.execute_values, cur,
+            "insert %s and %s", [])
+        self.assertRaises(ValueError, psycopg2.extras.execute_values, cur,
+            "insert %f", [])
+        self.assertRaises(ValueError, psycopg2.extras.execute_values, cur,
+            "insert %f %s", [])
+
+    def test_percent_escape(self):
+        cur = self.conn.cursor()
+        psycopg2.extras.execute_values(cur,
+            "insert into testfast (id, data) values %s -- a%%b",
+            [(1, 'hi')])
+        self.assert_(b'a%%b' not in cur.query)
+        self.assert_(b'a%b' in cur.query)
+
+        cur.execute("select id, data from testfast")
+        self.assertEqual(cur.fetchall(), [(1, 'hi')])
+
+
+def test_suite():
+    return unittest.TestLoader().loadTestsFromName(__name__)
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/tests/test_green.py b/tests/test_green.py
index 0424a2c..6d1571d 100755
--- a/tests/test_green.py
+++ b/tests/test_green.py
@@ -27,7 +27,7 @@ import psycopg2
 import psycopg2.extensions
 import psycopg2.extras
 
-from testutils import ConnectingTestCase
+from testutils import ConnectingTestCase, slow
 
 
 class ConnectionStub(object):
@@ -61,6 +61,7 @@ class GreenTestCase(ConnectingTestCase):
             lambda conn: psycopg2.extras.wait_select(stub))
         return stub
 
+    @slow
     def test_flush_on_write(self):
         # a very large query requires a flush loop to be sent to the backend
         conn = self.conn
diff --git a/tests/test_lobject.py b/tests/test_lobject.py
index 4da20e9..3379ec0 100755
--- a/tests/test_lobject.py
+++ b/tests/test_lobject.py
@@ -29,8 +29,8 @@ from functools import wraps
 
 import psycopg2
 import psycopg2.extensions
-from testutils import unittest, decorate_all_tests, skip_if_tpc_disabled
-from testutils import ConnectingTestCase, skip_if_green
+from testutils import (unittest, decorate_all_tests, skip_if_tpc_disabled,
+    ConnectingTestCase, skip_if_green, slow)
 
 
 def skip_if_no_lo(f):
@@ -191,6 +191,7 @@ class LargeObjectTests(LargeObjectTestCase):
         self.assertEqual(x, u"some")
         self.assertEqual(lo.read(), u" data " + snowman)
 
+    @slow
     def test_read_large(self):
         lo = self.conn.lobject()
         data = "data" * 1000000
diff --git a/tests/test_module.py b/tests/test_module.py
index 6a1606d..8b31a09 100755
--- a/tests/test_module.py
+++ b/tests/test_module.py
@@ -26,8 +26,8 @@ import os
 import sys
 from subprocess import Popen
 
-from testutils import unittest, skip_before_python, skip_before_postgres
-from testutils import ConnectingTestCase, skip_copy_if_green, script_to_py3
+from testutils import (unittest, skip_before_python, skip_before_postgres,
+    ConnectingTestCase, skip_copy_if_green, script_to_py3, assertDsnEqual, slow)
 
 import psycopg2
 
@@ -36,24 +36,21 @@ class ConnectTestCase(unittest.TestCase):
     def setUp(self):
         self.args = None
 
-        def conect_stub(dsn, connection_factory=None, async=False):
-            self.args = (dsn, connection_factory, async)
+        def connect_stub(dsn, connection_factory=None, async_=False):
+            self.args = (dsn, connection_factory, async_)
 
         self._connect_orig = psycopg2._connect
-        psycopg2._connect = conect_stub
+        psycopg2._connect = connect_stub
 
     def tearDown(self):
         psycopg2._connect = self._connect_orig
 
-    def assertDsnEqual(self, dsn1, dsn2):
-        self.assertEqual(set(dsn1.split()), set(dsn2.split()))
-
     def test_there_has_to_be_something(self):
         self.assertRaises(TypeError, psycopg2.connect)
         self.assertRaises(TypeError, psycopg2.connect,
-            connection_factory=lambda dsn, async=False: None)
+            connection_factory=lambda dsn, async_=False: None)
         self.assertRaises(TypeError, psycopg2.connect,
-            async=True)
+            async_=True)
 
     def test_no_keywords(self):
         psycopg2.connect('')
@@ -92,27 +89,27 @@ class ConnectTestCase(unittest.TestCase):
         self.assertEqual(self.args[0], 'options=stuff')
 
     def test_factory(self):
-        def f(dsn, async=False):
+        def f(dsn, async_=False):
             pass
 
         psycopg2.connect(database='foo', host='baz', connection_factory=f)
-        self.assertDsnEqual(self.args[0], 'dbname=foo host=baz')
+        assertDsnEqual(self, self.args[0], 'dbname=foo host=baz')
         self.assertEqual(self.args[1], f)
         self.assertEqual(self.args[2], False)
 
         psycopg2.connect("dbname=foo host=baz", connection_factory=f)
-        self.assertDsnEqual(self.args[0], 'dbname=foo host=baz')
+        assertDsnEqual(self, self.args[0], 'dbname=foo host=baz')
         self.assertEqual(self.args[1], f)
         self.assertEqual(self.args[2], False)
 
     def test_async(self):
-        psycopg2.connect(database='foo', host='baz', async=1)
-        self.assertDsnEqual(self.args[0], 'dbname=foo host=baz')
+        psycopg2.connect(database='foo', host='baz', async_=1)
+        assertDsnEqual(self, self.args[0], 'dbname=foo host=baz')
         self.assertEqual(self.args[1], None)
         self.assert_(self.args[2])
 
-        psycopg2.connect("dbname=foo host=baz", async=True)
-        self.assertDsnEqual(self.args[0], 'dbname=foo host=baz')
+        psycopg2.connect("dbname=foo host=baz", async_=True)
+        assertDsnEqual(self, self.args[0], 'dbname=foo host=baz')
         self.assertEqual(self.args[1], None)
         self.assert_(self.args[2])
 
@@ -124,7 +121,7 @@ class ConnectTestCase(unittest.TestCase):
 
     def test_empty_param(self):
         psycopg2.connect(database='sony', password='')
-        self.assertDsnEqual(self.args[0], "dbname=sony password=''")
+        assertDsnEqual(self, self.args[0], "dbname=sony password=''")
 
     def test_escape(self):
         psycopg2.connect(database='hello world')
@@ -147,7 +144,7 @@ class ConnectTestCase(unittest.TestCase):
         self.assertEqual(self.args[0], 'dbname=bar')
 
         psycopg2.connect('dbname=foo', user='postgres')
-        self.assertDsnEqual(self.args[0], 'dbname=foo user=postgres')
+        assertDsnEqual(self, self.args[0], 'dbname=foo user=postgres')
 
 
 class ExceptionsTestCase(ConnectingTestCase):
@@ -311,6 +308,7 @@ class ExceptionsTestCase(ConnectingTestCase):
 
 
 class TestExtensionModule(unittest.TestCase):
+    @slow
     def test_import_internal(self):
         # check that the internal package can be imported "naked"
         # we may break this property if there is a compelling reason to do so,
diff --git a/tests/test_notify.py b/tests/test_notify.py
index 1a0ac45..0e74e1d 100755
--- a/tests/test_notify.py
+++ b/tests/test_notify.py
@@ -26,7 +26,7 @@ from testutils import unittest
 
 import psycopg2
 from psycopg2 import extensions
-from testutils import ConnectingTestCase, script_to_py3
+from testutils import ConnectingTestCase, script_to_py3, slow
 from testconfig import dsn
 
 import sys
@@ -72,6 +72,7 @@ conn.close()
 
         return Popen([sys.executable, '-c', script_to_py3(script)], stdout=PIPE)
 
+    @slow
     def test_notifies_received_on_poll(self):
         self.autocommit(self.conn)
         self.listen('foo')
@@ -90,6 +91,7 @@ conn.close()
         self.assertEqual(pid, self.conn.notifies[0][0])
         self.assertEqual('foo', self.conn.notifies[0][1])
 
+    @slow
     def test_many_notifies(self):
         self.autocommit(self.conn)
         for name in ['foo', 'bar', 'baz']:
@@ -109,6 +111,7 @@ conn.close()
             self.assertEqual(pids[name], pid)
             names.pop(name)     # raise if name found twice
 
+    @slow
     def test_notifies_received_on_execute(self):
         self.autocommit(self.conn)
         self.listen('foo')
@@ -119,6 +122,7 @@ conn.close()
         self.assertEqual(pid, self.conn.notifies[0][0])
         self.assertEqual('foo', self.conn.notifies[0][1])
 
+    @slow
     def test_notify_object(self):
         self.autocommit(self.conn)
         self.listen('foo')
@@ -128,6 +132,7 @@ conn.close()
         notify = self.conn.notifies[0]
         self.assert_(isinstance(notify, psycopg2.extensions.Notify))
 
+    @slow
     def test_notify_attributes(self):
         self.autocommit(self.conn)
         self.listen('foo')
@@ -140,6 +145,7 @@ conn.close()
         self.assertEqual('foo', notify.channel)
         self.assertEqual('', notify.payload)
 
+    @slow
     def test_notify_payload(self):
         if self.conn.server_version < 90000:
             return self.skipTest("server version %s doesn't support notify payload"
@@ -155,6 +161,7 @@ conn.close()
         self.assertEqual('foo', notify.channel)
         self.assertEqual('Hello, world!', notify.payload)
 
+    @slow
     def test_notify_deque(self):
         from collections import deque
         self.autocommit(self.conn)
@@ -167,6 +174,7 @@ conn.close()
         self.assert_(isinstance(notify, psycopg2.extensions.Notify))
         self.assertEqual(len(self.conn.notifies), 0)
 
+    @slow
     def test_notify_noappend(self):
         self.autocommit(self.conn)
         self.conn.notifies = None
diff --git a/tests/test_replication.py b/tests/test_replication.py
index 79d1295..0aed578 100755
--- a/tests/test_replication.py
+++ b/tests/test_replication.py
@@ -183,7 +183,7 @@ class AsyncReplicationTest(ReplicationTestCase):
     @skip_repl_if_green
     def test_async_replication(self):
         conn = self.repl_connect(
-            connection_factory=LogicalReplicationConnection, async=1)
+            connection_factory=LogicalReplicationConnection, async_=1)
         if conn is None:
             return
 
diff --git a/tests/test_transaction.py b/tests/test_transaction.py
index 2dc44ec..36947de 100755
--- a/tests/test_transaction.py
+++ b/tests/test_transaction.py
@@ -23,7 +23,7 @@
 # License for more details.
 
 import threading
-from testutils import unittest, ConnectingTestCase, skip_before_postgres
+from testutils import unittest, ConnectingTestCase, skip_before_postgres, slow
 
 import psycopg2
 from psycopg2.extensions import (
@@ -131,6 +131,7 @@ class DeadlockSerializationTests(ConnectingTestCase):
 
         ConnectingTestCase.tearDown(self)
 
+    @slow
     def test_deadlock(self):
         self.thread1_error = self.thread2_error = None
         step1 = threading.Event()
@@ -178,6 +179,7 @@ class DeadlockSerializationTests(ConnectingTestCase):
         self.assertTrue(isinstance(
             error, psycopg2.extensions.TransactionRollbackError))
 
+    @slow
     def test_serialisation_failure(self):
         self.thread1_error = self.thread2_error = None
         step1 = threading.Event()
diff --git a/tests/test_types_extras.py b/tests/test_types_extras.py
index 8e61561..264fca8 100755
--- a/tests/test_types_extras.py
+++ b/tests/test_types_extras.py
@@ -17,14 +17,14 @@ from __future__ import with_statement
 
 import re
 import sys
+import warnings
 from decimal import Decimal
 from datetime import date, datetime
 from functools import wraps
 from pickle import dumps, loads
 
-from testutils import unittest, skip_if_no_uuid, skip_before_postgres
-from testutils import ConnectingTestCase, decorate_all_tests
-from testutils import py3_raises_typeerror
+from testutils import (unittest, skip_if_no_uuid, skip_before_postgres,
+    ConnectingTestCase, decorate_all_tests, py3_raises_typeerror, slow)
 
 import psycopg2
 import psycopg2.extras
@@ -77,7 +77,10 @@ class TypesExtrasTests(ConnectingTestCase):
         self.failUnless(type(s) == list and len(s) == 0)
 
     def testINET(self):
-        psycopg2.extras.register_inet()
+        with warnings.catch_warnings():
+            warnings.simplefilter('ignore', DeprecationWarning)
+            psycopg2.extras.register_inet()
+
         i = psycopg2.extras.Inet("192.168.1.0/24")
         s = self.execute("SELECT %s AS foo", (i,))
         self.failUnless(i.addr == s.addr)
@@ -86,7 +89,10 @@ class TypesExtrasTests(ConnectingTestCase):
         self.failUnless(s is None)
 
     def testINETARRAY(self):
-        psycopg2.extras.register_inet()
+        with warnings.catch_warnings():
+            warnings.simplefilter('ignore', DeprecationWarning)
+            psycopg2.extras.register_inet()
+
         i = psycopg2.extras.Inet("192.168.1.0/24")
         s = self.execute("SELECT %s AS foo", ([i],))
         self.failUnless(i.addr == s[0].addr)
@@ -708,6 +714,7 @@ class AdaptTypeTestCase(ConnectingTestCase):
         curs.execute("select (1,2)::type_ii")
         self.assertRaises(psycopg2.DataError, curs.fetchone)
 
+    @slow
     @skip_if_no_composite
     @skip_before_postgres(8, 4)
     def test_from_tables(self):
diff --git a/tests/testutils.py b/tests/testutils.py
index 9347735..f1c93de 100644
--- a/tests/testutils.py
+++ b/tests/testutils.py
@@ -50,7 +50,9 @@ else:
             @wraps(f)
             def skipIf__(self):
                 if cond:
-                    warnings.warn(msg)
+                    with warnings.catch_warnings():
+                        warnings.simplefilter('always', UserWarning)
+                        warnings.warn(msg)
                     return
                 else:
                     return f(self)
@@ -61,7 +63,9 @@ else:
         return skipIf(True, msg)
 
     def skipTest(self, msg):
-        warnings.warn(msg)
+        with warnings.catch_warnings():
+            warnings.simplefilter('always', UserWarning)
+            warnings.warn(msg)
         return
 
     unittest.TestCase.skipTest = skipTest
@@ -130,7 +134,7 @@ class ConnectingTestCase(unittest.TestCase):
         import psycopg2
         try:
             conn = self.connect(**kwargs)
-            if conn.async == 1:
+            if conn.async_ == 1:
                 self.wait(conn)
         except psycopg2.OperationalError, e:
             # If pgcode is not set it is a genuine connection error
@@ -447,7 +451,6 @@ def script_to_py3(script):
 
 
 class py3_raises_typeerror(object):
-
     def __enter__(self):
         pass
 
@@ -455,3 +458,22 @@ class py3_raises_typeerror(object):
         if sys.version_info[0] >= 3:
             assert type is TypeError
             return True
+
+
+def slow(f):
+    """Decorator to mark slow tests we may want to skip
+
+    Note: in order to find slow tests you can run:
+
+    make check 2>&1 | ts -i "%.s" | sort -n
+    """
+    @wraps(f)
+    def slow_(self):
+        if os.environ.get('PSYCOPG2_TEST_FAST'):
+            return self.skipTest("slow test")
+        return f(self)
+    return slow_
+
+
+def assertDsnEqual(testsuite, dsn1, dsn2):
+    testsuite.assertEqual(set(dsn1.split()), set(dsn2.split()))