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| author | Terry Wilson <twilson@redhat.com> | 2021-10-12 14:13:31 -0500 |
|---|---|---|
| committer | Ilya Maximets <i.maximets@ovn.org> | 2021-11-09 00:27:10 +0100 |
| commit | 04b017e3a2102e7fe056f7ac1afbd0bd789e315e (patch) | |
| tree | c42f7ad676c29019cdfaa14b870b9488d7f5542d /python | |
| parent | 695530d8fb07eb15adbc3506bb7abe2c7f5681d8 (diff) | |
| download | openvswitch-04b017e3a2102e7fe056f7ac1afbd0bd789e315e.tar.gz | |
python: db: Avoid allocation of an attr dict/row+column.
Python objects normally have a dictionary named __dict__ allocated
for handling dynamically assigned attributes. Depending on
architecture and Python version, that empty dict may be between
64 and 280 bytes.
Seeing as Atom and Datum objects do not need dynamic attribute
support and there can be millions of rows in a database, avoiding
this allocation with __slots__ can save 100s of MBs of memory per
Idl process.
Signed-off-by: Terry Wilson <twilson@redhat.com>
Acked-by: Timothy Redaelli <tredaelli@redhat.com>
Tested-by: Timothy Redaelli <tredaelli@redhat.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
Diffstat (limited to 'python')
| -rw-r--r-- | python/ovs/db/data.py | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/python/ovs/db/data.py b/python/ovs/db/data.py index 99bf80ed6..8db21b837 100644 --- a/python/ovs/db/data.py +++ b/python/ovs/db/data.py @@ -64,6 +64,8 @@ def returnUnchanged(x): @functools.total_ordering class Atom(object): + __slots__ = ('value', 'type') + def __init__(self, type_, value=None): self.type = type_ if value is not None: @@ -266,6 +268,8 @@ class Atom(object): @functools.total_ordering class Datum(object): + __slots__ = ('type', 'values') + def __init__(self, type_, values={}): self.type = type_ self.values = values |