JavaScript speedups in Firefox 3.6 ✩ hacks.mozilla.orgThis post was written by David Mandelin who works on Mozilla’s JavaScript team. Firefox 3.5 introduced TraceMonkey, our new JavaScript engine that traces loops and JIT compiles them to native (x86/ARM) code. Many JavaScript programs ran 3-4x faster in TraceMonkey compared to Firefox 3. (See our previous article for technical details.) For JavaScript performance in Firefox 3.6, we focused on the ar
