Ubuntu
firefox package

  1. Bug #788102
  2. Comment #22

Comment 22 for bug 788102

Revision history for this message
In , Roc-ocallahan (roc-ocallahan) wrote :

76% of the time is under _handleWindowNeedsDisplay --- painting. The rest is system/Appkit overhead plus some event firing (timeout events, scroll events).

Under painting:

16.7% under BuildDisplayListForStackingContext (display list construction)
10% under nsDisplayList::ComputeVisibilityForRoot (computing visible rects for everything)
9.3% under FrameLayerBuilder::BuildContainerLayerFor (layer construction)
2.5% under FrameLayerBuilder::WillEndTransaction (updating FrameLayerBuilder stuff)
31.7% under BasicLayerManager::EndTransaction (compositing layer tree)

Under EndTransaction:
10% painting the scrolled-into-view contents of ThebesLayers
21% drawing ThebesLayerBuffers into the destination. Almost all of that is in CGBlt_copyBytes --- memcpy.