funcall-array.js - mozsearch

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var emptyArray = [];

var denseArray = [1, 2, 3, 4];

var sparseArray = [1,,2,,3,,4];

var bigArray = new Array();

for (var i = 0; i < 128; i++) {

    bigArray.push(i);

var nonArray = {0:1, 1:2, 2:3, 3:4, length:2};

var indexedGetterArray = new Array();

Object.defineProperty(indexedGetterArray, '2', {get:function () { return 51; }});

var ARRAYS = [emptyArray, denseArray, sparseArray, bigArray, nonArray, indexedGetterArray];

var targetFun = function (a, b, c, d) {

    if (a === undefined)

        a = 0;

    if (b === undefined)

        b = 0;

    if (c === undefined)

        c = 0;

    if (d === undefined)

        d = 0;

    this.count += arguments.length + a + b + c + d;

var PERMUTATIONS = ARRAYS.length * ARRAYS.length;

function arrayPermutation(num) {

    var idx1 = num % ARRAYS.length;

    var idx2 = ((num / ARRAYS.length)|0) % ARRAYS.length;

    var resultArray = [];

    resultArray.push(ARRAYS[idx1]);

    resultArray.push(ARRAYS[idx2]);

    return resultArray;

var EXPECTED_RESULTS = {

    0:0, 1:280, 2:200, 3:2680, 4:100, 5:1080, 6:280, 7:560, 8:480, 9:2960,

    10:380, 11:1360, 12:200, 13:480, 14:400, 15:2880, 16:300, 17:1280, 18:2680,

    19:2960, 20:2880, 21:5360, 22:2780, 23:3760, 24:100, 25:380, 26:300, 27:2780,

    28:200, 29:1180, 30:1080, 31:1360, 32:1280, 33:3760, 34:1180, 35:2160

};

var callerNo = 0;

function generateCaller() {

    var fn;

    // Salt eval-string with callerNo to make sure eval caching doesn't take effect.

    var s = "function caller" + callerNo + "(fn, thisObj, arrays) {" +

            "  for (var i = 0; i < arrays.length; i++) {" +

            "    fn.apply(thisObj, arrays[i]);" +

            "  }" +

            "}" +

            "fn = caller" + callerNo + ";";

    eval(s);

    return fn;

};

function main() {

    for (var i = 0; i < PERMUTATIONS; i++) {

        var obj = {count:0};

        var arrs = arrayPermutation(i);

        var fn = generateCaller(arrs.length);

        // Loop 20 times so baseline compiler has chance to kick in and compile the scripts.

        for (var j = 0; j < 20; j++)

            fn(targetFun, obj, arrs);

        assertEq(obj.count, EXPECTED_RESULTS[i]);

main();