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Archive for 'TraceMonkey'

TraceVis: performance visualization for TraceMonkey

I’ve been working on a visualization of TraceMonkey performance, with the goal of revealing what the JS VM is doing, and why it runs certain programs fast or slow, so we can figure out how to make the slow ones fast too. In this post, I want to show off the results and explain how […]

A History of Insanity in the Age of x86

It’s been a long time since i’ve blogged–I’ve been pretty deep in coding mode. But bug 471822 has been fixed, and it’s time to celebrate with a post. Bug 471822 is a TraceMonkey performance regression on SunSpider of about 70 ms or so that Andreas Gal noticed recently. And it was worse than a simple […]