array-micro.js

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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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 */



function bench(name, func) {
    var start = Date.now();
    for (var iter = 0; iter < 5e6; iter++) {
        func();
    }
    print((Date.now() - start) + "\t" + name);
}

bench("[]", function() {
    [];
    [];
    [];
});

bench("[1, 2, 3]", function() {
    [1, 2, 3];
    [1, 2, 3];
    [1, 2, 3];
});

bench("[1 .. 20]", function() {
    [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20];
    [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20];
    [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20];
});

bench("new Array()", function() {
    new Array();
    new Array();
    new Array();
});


bench("new Array(1, 2, 3)", function() {
    new Array(1, 2, 3);
    new Array(1, 2, 3);
    new Array(1, 2, 3);
});

bench("new Array(10)", function() {
    new Array(10);
    new Array(10);
    new Array(10);
});

var array = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];

bench("get", function() {
    array[0];
    array[3];
    array[6];
});

bench("set", function() {
    array[0] = 0;
    array[3] = 3;
    array[6] = 6;
});

bench("push", function() {
    var arr = [1, 2, 3];
    arr.push(4);
    arr.push(5);
    arr.push(6);
});

bench("pop", function() {
    var arr = [1, 2, 3];
    arr.pop();
    arr.pop();
    arr.pop();
});

bench("splice", function() {
    [1, 2, 3].splice(0, 2, 5, 6, 7);
});

var all = function(e) { return true; };
var none = function(e) { return false; };

bench("filter all", function() {
    array.filter(all);
});

bench("filter none", function() {
    array.filter(none);
});

var up = function(a, b) { return a > b ? 1 : -1; };
var down = function(a, b) { return a < b ? 1 : -1; };

bench("sort up", function() {
    [1, 2, 3, 4].sort(up);
});

bench("sort down", function() {
    [1, 2, 3, 4].sort(down);
});