gistfile2.txt

node_stuffs_bench.js

var arr = [];
for (var i = 0; i < 1000000; i++) {
    arr[i] = i.toString(16);
}

function now() {
    return new Date().getTime();
}

var start = now();
for (var i = 0; i < arr.length; i++) {
    arr[i].toUpperCase();
}
var end = now();
console.log('for {} ... cost :' + (end - start));

start = now();
arr.forEach(String.prototype.toUpperCase);
end = now();
console.log('forEach ... cost :' + (end - start));

start = now();
for (var i = 0; i < 1000000; i++) {
    var x = Number('1');
}
end = now();
console.log('Number(str) ... cost :' + (end - start));

start = now();
for (var i = 0; i < 1000000; i++) {
    var x = '1' | 0;
}
end = now();
console.log('str | 0 ... cost :' + (end - start));

start = now();
for (var i = 0; i < 1000000; i++) {
    var x = '1' << 0;
}
end = now();
console.log('str << 0 ... cost :' + (end - start));

start = now();
for (var i = 0; i < 1000000; i++) {
    var x = '1' >> 0;
}
end = now();
console.log('str >> 0 ... cost :' + (end - start));