Run results for: slice vs subarray vs set custom

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36

Browser: Chrome 92

Operating system: Linux

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
subarray direct	8478388.0 Ops/sec
slice direct	6138522.0 Ops/sec
subarray copy	2682623.5 Ops/sec
slice copy	2346443.0 Ops/sec
subarray set	2708105.5 Ops/sec
slice set	2470146.0 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 u8 = new Uint8Array(data);

Tests:

subarray direct
var copy = u8.subarray(10, 20);
slice direct
var copy = u8.slice(10, 20);
subarray copy
var copy = new Uint8Array(u8.subarray(10, 20));
slice copy
var copy = new Uint8Array(u8.slice(10, 20));
subarray set
var copy = new Uint8Array(10).set(u8.subarray(10, 20));
slice set
var copy = new Uint8Array(10).set(u8.slice(10, 20));

Run results for: slice vs subarray vs set custom

subarray direct

slice direct

subarray copy

slice copy

subarray set

slice set