[Webkit-unassigned] [Bug 96274] YouTube’s start page is very slow

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Mon Sep 10 13:59:47 PDT 2012


https://bugs.webkit.org/show_bug.cgi?id=96274





--- Comment #5 from Paul Menzel <paulepanter at users.sourceforge.net>  2012-09-10 14:00:09 PST ---
I can reproduce it again after restarting the system. I am not sure how to debug this. Help is very much appreciated.

# cmdline : /usr/bin/perf_3.2 record /usr/lib/webkitgtk-3.0-0/libexec/GtkLauncher 
# event : name = cycles, type = 0, config = 0x0, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, id = { 79, 80 }
# HEADER_CPU_TOPOLOGY info available, use -I to display
# ========
#
# Events: 6K cycles
#
# Overhead      Command                       Shared Object                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        Symbol
# ........  ...........  ..................................  ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
#
     2.09%  GtkLauncher  libwebkitgtk-3.0.so.0.13.2          [.] WebCore::RenderBox::computeRectForRepaint(WebCore::RenderBoxModelObject*, WebCore::IntRect&, bool) const
     1.97%  GtkLauncher  libwebkitgtk-3.0.so.0.13.2          [.] WebCore::RenderBox::mapLocalToContainer(WebCore::RenderBoxModelObject*, bool, bool, WebCore::TransformState&, bool*) const
     1.53%  GtkLauncher  libwebkitgtk-3.0.so.0.13.2          [.] WebCore::RenderLayer::hitTestLayer(WebCore::RenderLayer*, WebCore::RenderLayer*, WebCore::HitTestRequest const&, WebCore::HitTestResult&, WebCore::IntRect const&, WebCore::IntPoint const&, bool, WebCore::HitTestingTransformState const*, double*)
     1.45%  GtkLauncher  libwebkitgtk-3.0.so.0.13.2          [.] WebCore::RenderLayer::convertToLayerCoords(WebCore::RenderLayer const*, WebCore::IntPoint&) const
     1.35%  GtkLauncher  libwebkitgtk-3.0.so.0.13.2          [.] __x86.get_pc_thunk.bx
     1.33%  GtkLauncher  libwebkitgtk-3.0.so.0.13.2          [.] WebCore::RenderObject::containingBlock() const
     1.26%  GtkLauncher  [kernel.kallsyms]                   [k] acpi_pm_read
     1.19%  GtkLauncher  libwebkitgtk-3.0.so.0.13.2          [.] WebCore::RenderBox::offsetFromContainer(WebCore::RenderObject*, WebCore::IntPoint const&) const
     1.18%  GtkLauncher  libc-2.13.so                        [.] __memcpy_ia32
     0.98%    gtk-gnash  ld-2.13.so                          [.] do_lookup_x
     0.88%  GtkLauncher  libm-2.13.so                        [.] __lroundf
     0.87%  GtkLauncher  libwebkitgtk-3.0.so.0.13.2          [.] WebCore::RenderLayer::calculateRects(WebCore::RenderLayer const*, WebCore::RenderRegion*, WebCore::IntRect const&, WebCore::IntRect&, WebCore::ClipRect&, WebCore::ClipRect&, WebCore::ClipRect&, bool, WebCore::OverlayScrollbarSizeRelevancy) const
     0.79%  GtkLauncher  libwebkitgtk-3.0.so.0.13.2          [.] WebCore::RenderBox::topLeftLocationOffset() const
     0.78%  GtkLauncher  libwebkitgtk-3.0.so.0.13.2          [.] WebCore::TransformState::move(int, int, WebCore::TransformState::TransformAccumulation)
     0.77%    gtk-gnash  [kernel.kallsyms]                   [k] copy_user_highpage.isra.27
     0.72%  GtkLauncher  ld-2.13.so                          [.] do_lookup_x
     0.68%  GtkLauncher  [kernel.kallsyms]                   [k] get_page_from_freelist
     0.67%  GtkLauncher  libpthread-2.13.so                  [.] pthread_mutex_lock
     0.64%  GtkLauncher  libgobject-2.0.so.0.3200.3          [.] g_type_check_instance_is_a
     0.62%  GtkLauncher  libfreetype.so.6.8.1                [.] 0xb11c  
     0.61%  GtkLauncher  libpixman-1.so.0.26.0               [.] 0x84a07 
     0.60%  GtkLauncher  libfreetype.so.6.8.1                [.] TT_RunIns
     0.56%  GtkLauncher  libjpeg.so.8.4.0                    [.] ycc_rgb_convert
     0.56%  GtkLauncher  libc-2.13.so                        [.] __strcmp_ia32
     0.55%  GtkLauncher  libwebkitgtk-3.0.so.0.13.2          [.] WebCore::RenderObject::container(WebCore::RenderBoxModelObject*, bool*) const
     0.52%  GtkLauncher  libc-2.13.so                        [.] _int_malloc
[…]

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