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| author | Kent Hansen <khansen@trolltech.com> | 2009-10-29 12:32:50 (GMT) |
|---|---|---|
| committer | Kent Hansen <khansen@trolltech.com> | 2009-10-29 12:44:47 (GMT) |
| commit | 84c250448f8b1a3adee4dcaf2fc8edb282dda225 (patch) | |
| tree | e5c3c33fd3dbc47f19ac1464619ceb1d33068b67 /src/corelib/global/qlibraryinfo.h | |
| parent | c3b4522259bbbe216b31cd66ec6ce26d68847823 (diff) | |
| download | Qt-84c250448f8b1a3adee4dcaf2fc8edb282dda225.zip Qt-84c250448f8b1a3adee4dcaf2fc8edb282dda225.tar.gz Qt-84c250448f8b1a3adee4dcaf2fc8edb282dda225.tar.bz2 | |
Cache a state's parent state
QAbstractState::parentState() is called heavily by the state machine
algorithm. The parent state is obtained by qobject_cast'ing
QObject::parent(). qobject_cast() is expensive. This commit introduces
caching of the result in order to improve performance.
We expect that the cache won't be invalidated much since the parent-child
relationship of states usually doesn't change after the state machine is
started.
Reviewed-by: Eskil Abrahamsen Blomfeldt
Diffstat (limited to 'src/corelib/global/qlibraryinfo.h')
0 files changed, 0 insertions, 0 deletions