88579 2012-06-07 14:43:39 -0700 The size of RenderLayer is too damn high! 2017-07-18 08:29:25 -0700 1 1 1 Unclassified WebKit Layout and Rendering 528+ (Nightly build) All All NEW P2 Normal --- 1 jchaffraix webkit-unassigned inferno jamesr simon.fraser tony oldest_to_newest 643934 0 jchaffraix 2012-06-07 14:43:39 -0700 While looking at some bad padding on RenderLayer, this is the size of RenderLayer: struct SameSizeAsRenderLayer : public ScrollableArea { virtual ~SameSizeAsRenderLayer() { } // Allocate vtable pointer. void* m_pointers[17]; #if USE(ACCELERATED_COMPOSITING) void* m_backing; #endif LayoutRect m_rects[3]; LayoutSize m_layoutSizes[2]; LayoutPoint m_layoutPoint; IntPoint m_point; LayoutUnit m_units[2]; IntSize m_sizes[2]; // We don't include our bitfield here to ensure that they are folded into the ones from ScrollableArea. // However it seems like some platforms don't fold the bitfield so you need another unsigned (as we have // 35 bits at the moment in RenderLayer - including the one from ScrollableArea). }; COMPILE_ASSERT(sizeof(RenderLayer) == sizeof(SameSizeAsRenderLayer), RenderLayer_should_avoid_increasing);