break_deep_loop

break_deep_loop.js

fun_closure = function(n) {
    for (i = 0; i < n; i++)
        (function(){
            for (j = 0; j < n; j++)
                for (k = 0; k < n; k++) {
                    if (j * k > n) return;
                    j + k;
                }
        })()
}

fun_flag = function(n) {
    is_break = false
    for (i = 0; i < n; i++)
        for (j = 0; j < n; j++)
            if (is_break) break;
            for (k = 0; k < n; k++) {
                if (j * k > n) {
                    is_break = true;
                    break;
                }
                j + k;
            }
}

fun_label = function(n) {
    for (i = 0; i < n; i++)
        jump_out:
        for (j = 0; j < n; j++)
            for (k = 0; k < n; k++) {
                if (j * k > n) break jump_out;
                j + k;
            }
}


test = function (fun, title) {
    time_stamp = Date.now();

    fun(5000);

    console.log('>> ' + title + ': ' + (Date.now() - time_stamp) + 'ms');
}


test(fun_closure, 'closure');
test(fun_flag, 'flag');
test(fun_label, 'label');

(function() {
for (var i = 0; i <10; i++)
    for (var j = 0; j < 10; j++)
        if (i * j > 20)
            return;
        else
            console.log(i+j);
})()

Closure's performance is not what I want.
The test result is:

>> closure: 3800ms
>> flag: 254ms