A copy of comment from bug 1100259. --- Olli Pettay [:smaug] 2015-01-22 14:17:06 PST Comment on attachment 8525763 [details] [diff] [review] [diff] [review] Add TaskTracer labels in EventDispatcher and console.log (revised) Don't know why this didn't get a review from a DOM peer. I hope MOZ_TASK_TRACER isn't set by default, since otherwise the change would have observable affect to the performance. Another thing, at this point of DOM event dispatch, we may not yet have a DOM Event, only WidgetEvent, so the change misses probably most of the events.
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