Benchmark: Array.prototype.concat vs spread operator vs stringify

Script Preparation code:

var array1 = Array(400).fill().map(() => Math.round(Math.random() * 40));
var array2 = Array(400).fill().map(() => Math.round(Math.random() * 40));

Tests:

Array.prototype.concat
var others = array1.concat(array2);
spread operator
var others = [...array1, ...array2];
stringify
var others = JSON.parse((JSON.stringify(array1)+JSON.stringify(array2)).replace('][',','))
concat apply
var others = [].concat.apply([], [array1, array2])
push apply
var others = [].push.apply(array1, array2);

Rendered benchmark preparation results:

Previous results

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Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Firefox/91.0

Browser/OS: Firefox 91 on Windows

Array.prototype.concat vs spread operator vs stringify (version: 0)