Null Executor memory reductions

[bdbaddog]

This issue was originally created at: 2008-08-16 08:23:41.
This issue was reported by: pankrat.
pankrat said at 2008-08-16 08:23:41

The attached patch reduces the memory footprint of Executor.Null by making it a
true stub and not inherit from Executor anymore. A Null executor object is
morphed to a real Executor object if an action is added through
'add_pre_action', 'add_post_action', 'set_action_list'.

Moreover, the singleton pattern is applied for the NullEnvironment object.

This way, Null executor objects can be cut down to 240 Byte (~25% of its
original size). Depending on the project, this can save about 3-4% of memory.

pankrat said at 2008-08-16 08:24:58

Created an attachment (id=474)
Refactored Executor.Null which not inherits from Executor

gregnoel said at 2008-08-19 12:37:37

Bug party triage.

gregnoel said at 2008-09-09 16:05:45

Bug party triage. Go for it.

pankrat said at 2008-09-12 11:18:04

Patch applied in revision 3390.

pankrat attached nullexecutor_stub.patch at 2008-08-16 08:24:58.

Refactored Executor.Null which not inherits from Executor