Binary-to-url benchmark in node.js

gistfile1.txt

#!/usr/bin/env node

var fs = require('fs');

var re = /(..)/g;
var methods = {
    with_escape:  function(data) {
        return escape(data.toString('binary'));
    },
    with_loop: function (data) {
        var buf = '';
        for (var n = 0; n < data.length; n++) {
            buf += '%' + data[n].toString(16);
        }
        return buf;
    },
    with_regex: function(data) {
        return data.toString('hex').toUpperCase().replace(/(..)/g, "%$1");
    },
    with_regex_lower: function(data) {
        return data.toString('hex').replace(/(..)/g, "%$1");
    },
    with_precompiled_regex: function(data) {
        return data.toString('hex').toUpperCase().replace(re, "%$1");
    },
    with_no_percents: function(data) {
        return data.toString('hex');
    },
};

fs.readFile('testfile.mp3', function(err, data) {
    console.log('Testing urlification of binary data of ' + data.length + ' bytes')

    Object.keys(methods).forEach(function(method) {
        var before = new Date();
        var encoded = methods[method](data);
        var after = new Date();
        var delta = after - before;
        console.log(method + ': ' + (delta / 1000) + ' seconds');
    });
});


/* Results:

count@bumba:~$ ./url-my-url.js 
Testing urlification of binary data of 6255970 bytes
with_escape: 0.27 seconds
with_loop: 1.643 seconds
with_regex: 2.404 seconds
with_regex_lower: 2.36 seconds
with_precompiled_regex: 2.233 seconds
with_no_percents: 1.375 seconds

*/