InfoQ
1 HN recommender · recommended in 3 months, 2013–2014
27:43 · 11K views · Mar 12, 2013
John McCutchan of Google explains how Dart and the Dart VM expose SIMD instructions to speed up web software. He covers what SIMD is and how it applies to graphics and games.
Pointed to as the original talk by the author of the SIMD-in-JavaScript proposal, whenever SIMD on the web comes up.
3 comments from Hacker News
Check "Bringing SIMD to the Web via Dart" by John McCutchan: this video He's also the guy wrote the proposal for ECMAScript: [LINK] Also, using SIMD is way easier than using shaders. You just write something like this: double average (Float32x4List list) { var n = list.length; var sum = new Float32x4.zero(); for (int i = 0; i < n; i++) { sum += list[i]; } var total = sum.x + sum.y + sum.z + sum.w; return total / (n * 4); } Instead of: double average (Float32List list) { var n = list.length; var sum = 0.0; for (int i = 0; i < n; i++) { sum += list[i]; } return sum / n; }
They've also published a new RayTracer OO benchmark showing the Dart VM far out performing V8: [LINK] Guessing being able to use native SIMD instructions inside the Dart VM should help with gaming and other graphics intensive apps: this video
Why Dart? SIMD - Single Instruction Multiple Data - Speeds up things like WebGL, added to Dart VM, not available in JavaScript except through an experimental technique in FireFox this video