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Performance/Status Meetings/2007-June-06: Difference between revisions
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Performance/Status Meetings/2007-June-06 (view source)
Revision as of 17:31, 6 June 2007
, 6 June 2007note on timing
Stan Shebs (talk | contribs) (note on timing) |
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In general, I _think_ that anything that's using JS Date.now() directly is good for 1ms precision (which means that tasks of under 100ms are hard to time to 1% accuracy). Anything using timeouts (I seem to recall Tp does this?) will get noise in it due to PR_IntervalNow; on Windows this might be a lot of noise. Ts uses the Perl timing, which should be ok. | In general, I _think_ that anything that's using JS Date.now() directly is good for 1ms precision (which means that tasks of under 100ms are hard to time to 1% accuracy). Anything using timeouts (I seem to recall Tp does this?) will get noise in it due to PR_IntervalNow; on Windows this might be a lot of noise. Ts uses the Perl timing, which should be ok. | ||
:JS timing is actually worse than 1ms on Mac - granularity is in 16 ms ticks, easily visible if you graph timings of short loops. gettimeofday() on Mac has a 1-microsecond granularity though. -Stan | |||
== Other Information == | == Other Information == | ||