<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE bugzilla SYSTEM "https://bugs.webkit.org/page.cgi?id=bugzilla.dtd">

<bugzilla version="5.0.4.1"
          urlbase="https://bugs.webkit.org/"
          
          maintainer="admin@webkit.org"
>

    <bug>
          <bug_id>37214</bug_id>
          
          <creation_ts>2010-04-07 08:59:55 -0700</creation_ts>
          <short_desc>poor scrolling performance with multiple backgrounds</short_desc>
          <delta_ts>2013-09-10 14:54:28 -0700</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>1</classification_id>
          <classification>Unclassified</classification>
          <product>WebKit</product>
          <component>Layout and Rendering</component>
          <version>528+ (Nightly build)</version>
          <rep_platform>All</rep_platform>
          <op_sys>All</op_sys>
          <bug_status>RESOLVED</bug_status>
          <resolution>FIXED</resolution>
          
          
          <bug_file_loc>http://css3exp.com/moon/</bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords>InRadar</keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>1</everconfirmed>
          <reporter name="Paul Irish">paulirish</reporter>
          <assigned_to name="Nobody">webkit-unassigned</assigned_to>
          <cc>simon.fraser</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>209659</commentid>
    <comment_count>0</comment_count>
    <who name="Paul Irish">paulirish</who>
    <bug_when>2010-04-07 08:59:55 -0700</bug_when>
    <thetext>http://css3exp.com/moon/ has 4 background images set on the body element.

Scrolling the page (via mousewheel) reveals very poor performance.
When the backgrounds are disabled, scrolling performance returns to normal.

Tested in Chrome, Safari and nightly webkit on XP and OS X 10.5</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>210545</commentid>
    <comment_count>1</comment_count>
    <who name="Sam Weinig">sam</who>
    <bug_when>2010-04-08 19:39:06 -0700</bug_when>
    <thetext>&lt;rdar://problem/7844080&gt;</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>927526</commentid>
    <comment_count>2</comment_count>
    <who name="Simon Fraser (smfr)">simon.fraser</who>
    <bug_when>2013-09-10 14:54:28 -0700</bug_when>
    <thetext>Tiled scrolling with fixed backgrounds made this fast.</thetext>
  </long_desc>
      
      

    </bug>

</bugzilla>