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| author | J-P Nurmi <jpnurmi@qt.io> | 2017-10-31 18:13:37 +0100 |
|---|---|---|
| committer | J-P Nurmi <jpnurmi@qt.io> | 2017-11-02 09:12:30 +0000 |
| commit | 05ba72454de8b1d4aaec304931c96d41b81ac9d2 (patch) | |
| tree | 5a35ddb3249ec1240cc6544f916f0a1dfd5b0615 /examples/quickcontrols2 | |
| parent | 02c44ee00777a76c3bf13cd0705d91435654a4c1 (diff) | |
Default: micro-optimize MenuItem
A binding to "<id>.<property>" is a tiny bit faster than a binding to
"parent.<property>". ID is a direct reference, like a pointer in C++,
whereas "parent" is a property so the binding is effectively depending
on two properties: "<property>.<property>".
The gain is not huge, but enough to show up in qmlbench. ;)
Before:
running: qmlbench/benchmarks/auto/creation/quick.controls2/delegates_menuitem.qml
[...] (10 repeats, all results between 65-66)
Average: 65.5 frames; using samples; MedianAll=66; StdDev=0.527046, CoV=0.00804651
After:
running: qmlbench/benchmarks/auto/creation/quick.controls2/delegates_menuitem.qml
[...] (10 repeats, all results between 66-67)
Average: 66.6 frames; using samples; MedianAll=67; StdDev=0.516398, CoV=0.00775372
Change-Id: Ib161fad3b11e19a4bb0f39900639131f36838d2a
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
Diffstat (limited to 'examples/quickcontrols2')
0 files changed, 0 insertions, 0 deletions