Benchmark: subarray vs slice vs copy and subarray

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 = data.slice(10, 20);
subarray copy
var copy = new Float32Array(data).subarray(10, 20);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
subarray direct
slice direct
subarray copy

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 11 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36 Edg/114.0.1823.43

Browser/OS: Chrome 114 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
subarray direct	9430810.0 Ops/sec
slice direct	12195230.0 Ops/sec
subarray copy	1249454.0 Ops/sec

subarray vs slice vs copy and subarray (version: 0)

Comparing performance of: subarray direct vs slice direct vs subarray copy

Created: 11 months ago by: Guest

Jump to the latest result

subarray direct

slice direct

subarray copy

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A