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azu/gist:369595

Created April 17, 2010 14:34
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gistfile1.js
// 大体早いもの順
console.time("test");
for(var i=0;i<10000;i++){
var src = "http://example.com/lab/test.js"
src.substring(0,src.lastIndexOf('/')+1)
}
console.timeEnd("test");
console.time("test2");
for(var i=0;i<10000;i++){
var a='http://example.com/lab/test.js'.split("/"); a.pop();
a.join("/") + "/";
}
console.timeEnd("test2");
console.time("test3");
for(var i=0;i<10000;i++){
"http://example.com/lab/test.js".split("/").slice(0,-1).join("/") + "/";
}
console.timeEnd("test3");
console.time("test4");
for(var i=0;i<10000;i++){
/^.+\//('http://example.com/lab/test.js')[0];
}
console.timeEnd("test4");
console.time("test5");
for(var i=0;i<10000;i++){
"http://example.com/lab/test.js".replace(/[^\/]+$/,"")
}
console.timeEnd("test5");
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