Run results for: slice vs subarray vs set

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:127.0) Gecko/20100101 Firefox/127.0

Browser: Firefox 127

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 2 years ago

slice direct

12.9M/s

slice set

8.1M/s

subarray direct

7.1M/s

slice copy

6.1M/s

subarray copy

4.9M/s

subarray set

4.4M/s

View exact numbers

Test name	Executions per second
✓ slice direct	12,899,934 Ops/sec
slice set	8,090,784 Ops/sec
subarray direct	7,117,156 Ops/sec
slice copy	6,066,846 Ops/sec
subarray copy	4,864,816 Ops/sec
subarray set	4,448,828 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, 20);
slice direct
var copy = f32.slice(10, 20);
subarray copy
var copy = new Float32Array(f32.subarray(10, 20));
slice copy
var copy = new Float32Array(f32.slice(10, 20));
subarray set
var copy = new Float32Array(10).set(f32.subarray(10, 20));
slice set
var copy = new Float32Array(10).set(f32.slice(10, 20));