I’m pleased to announce that we have rebooted AreWeFastYet with a whole new set of features! The big ones: The graphs now display a hybrid view that contains full history, as well as recent checkins. You can select areas of the … Continue reading
One of the primary goals of JIT engines for dynamic languages is to make high-level code run fast by compiling it into efficient machine code. A key property of this, however, is that the compiled code for any piece of … Continue reading
Luke Wagner recently completed an overhaul of the way SpiderMonkey accesses variables, especially closure variables, to make everything simpler and faster. He blogged about it on his personal blog, complete with “how this would be written in JS” code snippets: … Continue reading
Today we enabled IonMonkey, our newest JavaScript JIT, in Firefox 18. IonMonkey is a huge step forward for our JavaScript performance and our compiler architecture. But also, it’s been a highly focused, year-long project on behalf of the IonMonkey team, … Continue reading
Firefox 16 will be the first version to support incremental garbage collection. This is a major feature, over a year in the making, that makes Firefox smoother and less laggy. With incremental GC, Firefox responds more quickly to mouse clicks … Continue reading
Mozilla’s mission is “to promote openness, innovation and opportunity on the web.” Here on the JavaScript engine team we have unique opportunities to support this mission. Our work stretches from technical challenges like Incremental Garbage Collection to working out the details … Continue reading
