Editing Typed array iteration This edit will create a new revision. Your details (optional) Name Email (won’t be displayed; might be used for Gravatar) URL Test case details Title * Published (uncheck if you want to fiddle around before making the page public) Description (in case you feel further explanation is needed)(Markdown syntax is allowed) Array iteration Are you a spammer? (just answer the question) Preparation code Preparation code HTML (this will be inserted in the <body> of a valid HTML5 document in standards mode) (useful when testing DOM operations or including libraries) <canvas width="512" height="512" id="canvas" style="border: 1px dashed black;"> </canvas> <script> var classic = new Array(256); var context = document.getElementById("canvas").getContext("2d"); var imageData = context.getImageData(0, 0, 256, 256); var canvas = imageData.data; if (typeof Uint8Array !== 'undefined') { var typed8 = new Uint8Array(256); var typed16 = new Uint16Array(256); var typed32 = new Uint32Array(256); } for (var i = 0; i < 256; ++i) { var number = ~~ (Math.random() * 254) classic[i] = number; canvas[i] = number; if (typeof Uint8Array !== 'undefined') { typed8[i] = number; typed16[i] = number; typed32[i] = number; } } context.putImageData(imageData, 0, 0); </script> Include JavaScript libraries as follows: <script src="//cdn.ext/library.js"></script> Define setup for all tests (variables, functions, arrays or other objects that will be used in the tests) (runs before each clocked test loop, outside of the timed code region) (e.g. define local test variables, reset global variables, clear canvas, etc.) (see FAQ) Define teardown for all tests (runs after each clocked test loop, outside of the timed code region) (see FAQ) Code snippets to compare Test 1 Title Async (check if this is an asynchronous test) Code for (var ii = 0; ii < 256; ++ii) { classic[ii] += 1; } Test 2 Title Async (check if this is an asynchronous test) Code for (var ii = 0; ii < 256; ++ii) { canvas[ii] += 1; } Test 3 Title Async (check if this is an asynchronous test) Code if (typeof Uint8Array === 'undefined') { throw "Error"; } for (var ii = 0; ii < 256; ++ii) { typed8[ii] += 1; } Test 4 Title Async (check if this is an asynchronous test) Code if (typeof Uint8Array === 'undefined') { throw "Error"; } for (var ii = 0; ii < 256; ii += 2) { typed16[ii] += 1; } Test 5 Title Async (check if this is an asynchronous test) Code if (typeof Uint8Array === 'undefined') { throw "Error"; } for (var ii = 0; ii < 256; ii += 4) { typed32[ii] += 1; }