Status: New
Owner: ----
New issue 3667 by [email protected]: attempt to optimized dom binding
performance.
https://code.google.com/p/v8/issues/detail?id=3667
WebKit/JSC leads Chrome/V8 a lot in Dromaeo/?dom-query benchmark. And with
some deep analyses, we observed JSC generated ~50 instructions to call
nodeTypeCallback function, while v8 generated ~80 instructions for the core
loop for below benchmark.
window.onload = function()
{
var el = document.getElementsByTagName("div")[0];
var ret = 0;
var start = (new Date()).getTime();
//core loop start
for(var a = 0; a < 90000000; a++){
ret += el.nodeType;
}
// core loop end
var elapsed = (new Date()).getTime() - start;
alert("time: " + elapsed + " val: " + ret);
return ret;
}
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