<?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>139634</bug_id>
          
          <creation_ts>2014-12-14 20:58:16 -0800</creation_ts>
          <short_desc>Several fast/selectors tests are very slow in debug</short_desc>
          <delta_ts>2021-09-29 15:07:43 -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>CSS</component>
          <version>528+ (Nightly build)</version>
          <rep_platform>Unspecified</rep_platform>
          <op_sys>Unspecified</op_sys>
          <bug_status>NEW</bug_status>
          <resolution></resolution>
          
          <see_also>https://bugs.webkit.org/show_bug.cgi?id=61932</see_also>
    
    <see_also>https://bugs.webkit.org/show_bug.cgi?id=221308</see_also>
    
    <see_also>https://bugs.webkit.org/show_bug.cgi?id=230988</see_also>
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords></keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>1</everconfirmed>
          <reporter name="Alexey Proskuryakov">ap</reporter>
          <assigned_to name="Nobody">webkit-unassigned</assigned_to>
          <cc>benjamin</cc>
    
    <cc>cdumez</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>1055550</commentid>
    <comment_count>0</comment_count>
    <who name="Alexey Proskuryakov">ap</who>
    <bug_when>2014-12-14 20:58:16 -0800</bug_when>
    <thetext>These tests are so slow that that they frequently time out on bots an locally, especially when other tests run in parallel using hyper-threading.

fast/selectors/matches-backtracking.html took 44.6 seconds
fast/selectors/nth-child-of-register-requirement.html took 24.3 seconds
fast/selectors/not-backtracking.html took 23.5 seconds

This one may or may not have the same root cause, I imagine that jquery does a lot of CSS selector matching.

jquery/manipulation.html took 23.0 seconds</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1055552</commentid>
    <comment_count>1</comment_count>
    <who name="Alexey Proskuryakov">ap</who>
    <bug_when>2014-12-14 21:03:32 -0800</bug_when>
    <thetext>Marked as slow in &lt;http://trac.webkit.org/r177271&gt;. This may not fully help, as some ports appear to detect a timeout at another layer, and report the test as &quot;failing&quot;.</thetext>
  </long_desc>
      
      

    </bug>

</bugzilla>