JSON stringify vs slice vs structuredClone vs spread vs Array from
Date tested:
5 months ago
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36
Test name
Executions per second
JSON.stringify
1590880.0 Ops/sec
slice
10915440.0 Ops/sec
Array from
6616601.0 Ops/sec
Spread
10619310.0 Ops/sec
structuredClone
729029.9 Ops/sec
Benchmark definition (click to collapse):
Script Preparation code:
var vertices = [ [1, 0, 0, 0], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1], ] var myCopy = null;
Tests:
JSON.stringify
myCopy = JSON.parse(JSON.stringify(vertices));
slice
myCopy = vertices.slice();
Array from
myCopy = Array.from(vertices)
Spread
myCopy = [...vertices]
structuredClone
myCopy = structuredClone(vertices)
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