urlparser 介绍
urlparser 是一个 Node.js 的扩展，实现了快速的 URL 地址解析。
性能：
Petka Antonov@PETKAANTONOV-PC ~/urlparser (master)
$ node ./benchmark/urlparser.js
misc/url.js parse(): 402045.67
misc/url.js format(): 253946.82
misc/url.js resolve("../foo/bar?baz=boom"): 56701.419
misc/url.js resolve("foo/bar"): 80059.500
misc/url.js resolve("http://nodejs.org"): 118566.13
misc/url.js resolve("./foo/bar?baz"): 62778.648
Petka Antonov@PETKAANTONOV-PC ~/urlparser (master)
$ node ./benchmark/nodecore.js
misc/url.js parse(): 16459
misc/url.js format(): 15978
misc/url.js resolve("../foo/bar?baz=boom"): 6837.7
misc/url.js resolve("foo/bar"): 7038.6
misc/url.js resolve("http://nodejs.org"): 6491.1
misc/url.js resolve("./foo/bar?baz"): 6968.4