Status: Unconfirmed Owner: ---- Labels: OS-Linux Area-Misc Size-Medium Type-Bug
New issue 16977 by james.su: High cpu usage when moving mouse pointer on webpage continuously. http://code.google.com/p/chromium/issues/detail?id=16977 Chrome Version : svn 20899 OS + version : Ubuntu 9.04 CPU architecture (32-bit / 64-bit): 32-bit window manager : GNOME with compiz URLs (if applicable) : gmail.com Behavior in Firefox 3.x (if applicable): Much better than Chromium. Behavior in Chrome for Windows (optional): Unknown What steps will reproduce the problem? 1. login to gmail.com wait for fully loaded. 2. move mouse cursor on the web page continuously. 3. What is the expected result? cpu usage shouldn't go very high. What happens instead? cpu usage of render process goes to >80%, browser process goes to > 20%. While not moving mouse, cpu usage remains < 5%. Please provide any additional information below. Attach a screenshot and backtrace if possible. traced with sysprof, found that among the total time spent by render process: 26% is spent in RenderWidget::OnHandleInputEvent(), in which, WebCore::RenderLayer::hitTest() spends about 40%. 16% is spent in RenderWidget::OnPaintRectAck() 14% is spent in RenderWidget::DoDeferredPaint() 7% in WebCore::DOMTimer::fired() which calls JavaScript through V8. -- You received this message because you are listed in the owner or CC fields of this issue, or because you starred this issue. You may adjust your issue notification preferences at: http://code.google.com/hosting/settings --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Chromium-bugs" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/chromium-bugs?hl=en -~----------~----~----~----~------~----~------~--~---
