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Firefox/Projects/Startup Time Improvements/joelr notes: Difference between revisions
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Firefox/Projects/Startup Time Improvements/joelr notes (view source)
Revision as of 21:20, 9 September 2009
, 9 September 2009→September 9, 2009
Joel Reymont (talk | contribs) |
Joel Reymont (talk | contribs) |
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=== September 9, 2009 === | === September 9, 2009 === | ||
==== Reflow optimization ==== | |||
I've been thinking about speeding up reflows ([https://bugzilla.mozilla.org/show_bug.cgi?id=514275 Bug 514275]) but did not make progress until I got Boris Zbarsky involved. There are tons and tons of classes that reflow and I'm completely unfamiliar with that code. | I've been thinking about speeding up reflows ([https://bugzilla.mozilla.org/show_bug.cgi?id=514275 Bug 514275]) but did not make progress until I got Boris Zbarsky involved. There are tons and tons of classes that reflow and I'm completely unfamiliar with that code. | ||
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bz: But separately, it looks like reflows seem to be generally expensive | bz: But separately, it looks like reflows seem to be generally expensive | ||
</pre> | </pre> | ||
==== Performance measurement ==== | |||
Using [http://blog.vlad1.com/2009/07/28/measuring-startup/ Vlad's benchmark], I have 5.3s cold start and 0.9s warm start. Timing using the return from [http://mxr.mozilla.org/mozilla-central/source/browser/base/content/browser.js#903 BrowserStartup (JS)] gives me almost exactly the same results as Vlad's. | Using [http://blog.vlad1.com/2009/07/28/measuring-startup/ Vlad's benchmark], I have 5.3s cold start and 0.9s warm start. Timing using the return from [http://mxr.mozilla.org/mozilla-central/source/browser/base/content/browser.js#903 BrowserStartup (JS)] gives me almost exactly the same results as Vlad's. | ||