Created attachment 464573 [details] Test Case - Use 'Timeline' Hi Team, While going through Blink's commits, I came across another potential win in performance and reducing jank etc. Blink Commit - https://src.chromium.org/viewvc/blink?view=revision&revision=158500 WebKit Source - https://searchfox.org/wubkat/source/Source/WebCore/rendering/RenderWidget.cpp#138 ```Commit``` Previously, a layout could be caused by a RenderWidget changing position. For example, an iframe in a scrollable area would get called to layout if the area scrolled. This occurred because of the the following callstack: FrameView calls RenderWidget::updateWidgetPosition(...) which calls RenderWidget::updateWidgetGeometry(...) which calls RenderWidget::setWidgetGeometry(...) setWidgetGeometry would return true and force a layout if the frame rect changed position. This should only return true if the frame rect actually resizes, so this patch updates setWidgetGeometry to return false (not forcing a layout) if just the frame's position changes. ______ Just wanted to raise to get input whether this is something worth merging or exploring or we have plans to do any other things or this issue is not as bad on WebKit as Blink. Thanks!