MozillaWiki

Performance/Status Meetings/2008-January-23

< Performance‎ | Status Meetings
Revision as of 08:48, 23 January 2008 by Joduinn (talk | contribs) (→‎Performance)

« Back to Status Meetings

Gecko 1.9 Performance and Leaks Meeting Details

  • Wednesdays - Firefox 3 - 10:00am Pacific, 1:00pm Eastern
  • Script Conference Room, Building S, Mountain View
  • 650-903-0800 or 650-215-1282 x91 Conf# 217 (US/INTL)
  • 1-800-707-2533 (pin 369) Conf# 217 (US)
  • irc.mozilla.org #perf for backchannel

Leaks

  • Most (!!) extension leaks fixed by peters and igors work in bug 412491 and bug 398219.
  • Still a few leaks left with popular extensions, but haven't triaged remaining bugs yet.
  • Peterv has a patch to fix bug in cycle collector that causes many random crashes bug 407034, still awaiting review.
  • We're keeping closed windows alive too long after they are closed. bug 413447 seem to be one source. RDF bug another.

Action Items

  • AI:sicking Look into enabling trace-refcount, without the tracing part in nightlies.
  • AI:cbarrett Look into OS leaks on Mac.
  • AI:dbaron Make assertions fatal on new windows leak box.
  • AI:sicking Test leaked handles on windows manually using purify.
  • AI:sayrer Run leak buster while looking for trace-malloc leaks. [didn't get this done--sayrer]
  • AI:sicking to go through and prioritize leak bugs

Performance

  • What Tp tests do we need to keep? Some only run on tinderbox which is being phased out. See bug 372870, comment#15 .
  • JPEG/image speedups
  • Txul platform differences according to mac mini machines
    • mac: slowest on 1.8, slower still on 1.9 (30% regression) Looks even or better than branch
    • windows: fastest on 1.8, now in second place (30% regression) -- improving, still slower
    • linux: middle on 1.8, now fastest on 1.9 (30% improvement)
  • massive Ts regression in 2006
    • Ts analysis: bug 406810
    • Related to thread manager landing
    • Darin thinks it might be excessive painting.
  • Profile Guided Optimization
    • WPO turned on for windows (bug 361343) -- nice performance win on XP
    • Spidermonkey seems to respond well to PGO under GCC (bug 410994)
    • sayrer has entire browser building with -fprofile-generate on Linux. no results yet.
    • dbaron: shipped fx 1.0 with PGO on linux as well, was a 10% perf win... but compiler upgrade + build system breakage stopped us. We need to restart this on linux (and see about OSX).
    • -GL breaks some things on win32
  • On radar (unowned stuff that people have mentioned have mentioned we should look at at some point)
    • Theme optimization
    • roc's scrollbar issues
    • startup performance (fastload perf, loading libXUL and other files, etc.) (unowned)
    • more work to speed up onSecurityChange, but further work will require SSL work and reducing the number of notifications
    • XPConnect accessor speed (bug 412531) (request for priority+owner by dietrich)


  • Start/Stop Shark from JS (bug 411365 Patch)
    • Gets really clean profiles.
    • Install newest CHUD
    • Start Shark App.
    • Good setting for brief events is config->advanced 20us sample rate
    • Put shark in remote mode
    • Example from bug 412396 test:
 <html>
 <head>
 <title>Test JPEG Rendering Time - (Hacked from scragz' test)</title>
 <script type="text/javascript">
 
 connectShark();
 startShark(); // Start sampling
 
 startDate = new Date();
 startTime = startDate.getTime() / 1000;
 window.onload = function () {
   var ignoreMe = document.body.offsetWidth;
   var endTime = new Date();
 };
 window.scrollBy(0,1);
 function calceRenderingTime() {
 
   stopShark(); // Stop sampling 
   disconnectShark();
 
   endDate = new Date();
   endTime = endDate.getTime() / 1000;
   alert(endTime - startTime);
 }
 </script>
 </head>
 <body onload="calceRenderingTime();">
 ...

Action Items

  • make faster

Fragmentation

  • bug 407459 -- Hook up jemalloc to our build
    • ported to windows, mac and linux. integrated to build system on mac and linux. windows work continuing. Hope to have numbers by end of the week.
  • bug 403830 -- Content arena
  • Other bugs (should have perf and footprint keywords)
    • bug 403354 -- Get rid of nsCStringArray ParseString usage (maybe fixed?)
    • bug 407442 -- nsEventListenerManager allocates a lot [patch]
    • bug 408113 -- JS reallocate context->stackPool arenas way too often [patch]
    • bug 408301 -- XPConnect wrappers w/o XPConnect proto don't share JS scopes with their protos. [patch]
    • bug 410250 -- nsID/nsJSID stupid mallocs [patch]
    • bug 410357 -- use nsAutoTArray for nsCSSDeclaration::mOrder [patch]
    • bug 410392 -- stack allocate gfx objects [patch, needs work]
    • bug 408921 -- Arenas size+header are too big for size classification


Action Items

  • fix things
Retrieved from "https://wiki.mozilla.org/index.php?title=Performance/Status_Meetings/2008-January-23&oldid=80683"