JSTests/microbenchmarks/Int16Array-bubble-sort-with-byteLength.js

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// Test the performance of Int16Array by implementing a bubble sort.

function bubbleSort(array)
{
    for (var i = 1; i < (array.byteLength >> 1); ++i) {
        for (var j = 0; j < (array.byteLength >> 1) - i; ++j) {
            if (array[j + 1] < array[j]) {
                var tmp = array[j];
                array[j] = array[j + 1];
                array[j + 1] = tmp;
            }
        }
    }
}

// V8's random function.
myRandom = (function() {
  var seed = 49734321;
  return function() {
    // Robert Jenkins' 32 bit integer hash function.
    seed = ((seed + 0x7ed55d16) + (seed << 12))  & 0xffffffff;
    seed = ((seed ^ 0xc761c23c) ^ (seed >>> 19)) & 0xffffffff;
    seed = ((seed + 0x165667b1) + (seed << 5))   & 0xffffffff;
    seed = ((seed + 0xd3a2646c) ^ (seed << 9))   & 0xffffffff;
    seed = ((seed + 0xfd7046c5) + (seed << 3))   & 0xffffffff;
    seed = ((seed ^ 0xb55a4f09) ^ (seed >>> 16)) & 0xffffffff;
    return (seed & 0xfffffff) / 0x10000000;
  };
})();

function arrayToString(array) {
    var result = "[";
    for (var i = 0; i < (array.byteLength >> 1); ++i) {
        if (i)
            result += ", ";
        result += array[i];
    }
    return result + "]";
}

function validateSort(array) {
    for (var i = 0; i < (array.byteLength >> 1) - 1; ++i) {
        if (array[i + 1] < array[i])
            return false;
    }
    return true;
}

var array = new Int16Array(1000);
for (var count = 0; count < 10; ++count) {
    for (var i = 0; i < (array.byteLength >> 1); ++i) {
        array[i] = myRandom() * 65535;
    }
    
    bubbleSort(array);
    
    if (!validateSort(array))
        throw "Bad result: " + arrayToString(array);
}