Run results for: slice vs subarray vs ArrayBuffer copy

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; SAMSUNG SM-J810G) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/16.0 Chrome/92.0.4515.166 Mobile Safari/537.36

Browser: Chrome Mobile 92

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

subarray direct

650K/s

slice direct

540K/s

ArrayBuffer copy

292K/s

View exact numbers

Test name	Executions per second
✓ subarray direct	650,171 Ops/sec
slice direct	540,453 Ops/sec
ArrayBuffer copy	291,876 Ops/sec

Script Preparation code:

var data = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
var f32 = new Float32Array(data);

Tests:

subarray direct
var copy = f32.subarray(10, 16);
slice direct
var copy = f32.slice(10, 16);
ArrayBuffer copy
var copy = new Float32Array(f32.buffer, 10*4, 6);