uri.js

/* fork form https://gist.github.com/jlong/2428561 */

var parser = document.createElement('a');
parser.href = "http://example.com:3000/pathname/?search=test#hash";

parser.protocol; // => "http:"
parser.hostname; // => "example.com"
parser.port;     // => "3000"
parser.pathname; // => "/pathname/"
parser.search;   // => "?search=test"
parser.hash;     // => "#hash"
parser.host;     // => "example.com:3000"

url-by-regexp.js

// source: http://jsperf.com/url-parsing/5
// via: https://gist.github.com/jlong/2428561#comment-589710

var url = "http://jblas:password@mycompany.com:8080/mail/inbox?msg=1234&type=unread#msg-content";

var UrlParser = {
    regx: /^(((([^:\/#\?]+:)?(?:(\/\/)((?:(([^:@\/#\?]+)(?:\:([^:@\/#\?]+))?)@)?(([^:\/#\?\]\[]+|\[[^\/\]@#?]+\])(?:\:([0-9]+))?))?)?)?((\/?(?:[^\/\?#]+\/+)*)([^\?#]*)))?(\?[^#]+)?)(#.*)?/,
    get: function(url) {
        var matches = this.regx.exec(url);
        // map results
        return {
            href: matches[0],
            withoutHash: matches[1],
            url: matches[2],
            origin: matches[3],
            protocol: matches[4],
            protocolseparator: matches[5],
            credhost: matches[6],
            cred: matches[7],
            user: matches[8],
            pass: matches[9],
            host: matches[10],
            hostname: matches[11],
            port: matches[12],
            pathname: matches[13],
            segment1: matches[14],
            segment2: matches[15],
            search: matches[16],
            hash: matches[17]
        };
    }
};

// use it
var parsed3 = UrlParser.get(url);
parsed3.hostname;  // => "mycompany.com"
parsed3.search;    // => "?msg=1234&type=unread"

URL.js

var url = "http://example.com:3000/pathname/?search=test#hash";

var _a = new URL(url);

_a.protocol; // => "http:"
_a.hostname; // => "example.com"
_a.port;     // => "3000"
_a.pathname; // => "/pathname/"
_a.search;   // => "?search=test"
_a.hash;     // => "#hash"
_a.host;     // => "example.com:3000"

// try lookup all property in _a
console.dir(_a);

new URL() has to consider whether browsers is supported.

https://developer.mozilla.org/en-US/docs/Web/API/URL.URL#Browser_compatibility
IE don't support...

also see the preformance test:
http://jsperf.com/url-parsing/25

the action of createElement will let the method be slower

---

update:

getProperty form a DOM object might cause be slow...

visual regexp chart for the UrlParser.regx:
http://tinyurl.com/luo29x4