Recently, I’ve been spending a lot of time analyzing the speed of pure JavaScript engines, looking at how well they perform and what their particular strengths and weaknesses are. To start with, I analyzed the bleeding-edge code from: Rhino Spidermonkey (Firefox 3) Tamarin (Firefox 4?) JavaScriptCore (Safari 3) Right now I’m only looking at pure, JavaScript-only, tests (no tests of DOM or other AP