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Firefox/Projects/Startup Time Improvements/joelr notes: Difference between revisions
Firefox/Projects/Startup Time Improvements/joelr notes (view source)
Revision as of 16:50, 16 September 2009
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Joel Reymont (talk | contribs) |
Joel Reymont (talk | contribs) |
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=== September 16, 2009 === | === September 16, 2009 === | ||
==== I'm an idiot ==== | |||
I spent a month becoming an expert on DTrace, only to realize that it's not very useful to get a global picture of the bottlenecks because the overhead of tracing everything is so high! | |||
Shark is a much better tool to get a global picture, specially using "Time profile all states" which allocates time spent blocking to the calling function. I overlooked this initially since I did not zero in on the right thread, the one that has ''start'' and ''XRE_main'' or ''exit''. Without this it looks like Firefox is spending most of its time waiting on threads and Mach messages. | |||
==== Timing startup ==== | ==== Timing startup ==== | ||