diff options
| -rw-r--r-- | layout/base/FrameLayerBuilder.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/layout/base/FrameLayerBuilder.cpp b/layout/base/FrameLayerBuilder.cpp index 183285439..b315c348a 100644 --- a/layout/base/FrameLayerBuilder.cpp +++ b/layout/base/FrameLayerBuilder.cpp @@ -3648,6 +3648,10 @@ PaintedLayerData::AccumulateEventRegions(ContainerState* aState, nsDisplayLayerE if (alreadyHadRegions) { mDispatchToContentHitRegion.OrWith(CombinedTouchActionRegion()); } + + // Avoid quadratic performance as a result of the region growing to include + // and arbitrarily large number of rects, which can happen on some pages. + mMaybeHitRegion.SimplifyOutward(8); // Calculate scaled versions of the bounds of mHitRegion and mMaybeHitRegion // for quick access in FindPaintedLayerFor(). @@ -6368,3 +6372,4 @@ ContainerState::CreateMaskLayer(Layer *aLayer, } } // namespace mozilla + |