A couple critical path optimizations

(some sql operations faster by nearly 10% wallclock, general orm around 3%)

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/sqlalchemy/engine/default.py b/lib/sqlalchemy/engine/default.py
index ca22dd2a7..0ab0eb82b 100644
--- a/lib/sqlalchemy/engine/default.py
+++ b/lib/sqlalchemy/engine/default.py
@@ -140,13 +140,13 @@ class DefaultExecutionContext(base.ExecutionContext):
             self.isinsert = compiled.isinsert
             self.isupdate = compiled.isupdate
             if parameters is None:
-                self.compiled_parameters = compiled.construct_params({})
+                self.compiled_parameters = compiled.construct_params()
                 self.executemany = False
             elif not isinstance(parameters, (list, tuple)):
                 self.compiled_parameters = compiled.construct_params(parameters)
                 self.executemany = False
             else:
-                self.compiled_parameters = [compiled.construct_params(m or {}) for m in parameters]
+                self.compiled_parameters = [compiled.construct_params(m) for m in parameters]
                 if len(self.compiled_parameters) == 1:
                     self.compiled_parameters = self.compiled_parameters[0]
                     self.executemany = False