If you care a lot about 99.9999% of web code, as in code found on real webpages, try JSBench <http://jsbench.cs.purdue.edu> http://jsbench.cs.purdue.edu>. It's

If you care a lot about 99.9999% of web code, as in code found on real webpages, try JSBench <http://jsbench.cs.purdue.edu> http://jsbench.cs.purdue.edu>. It's the only JS benchmark made from JS found in actual real-world production webpages. JavaScriptCore clocks all the other JS engines on it by a ridiculous margin. It's neat that V8 is fast on long-running code that's not asm.js, but it's wrong to extrapolate that to most real-world web code.