Run results for: Array.prototype.concat vs spread operator vs flat [huge collection]

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.0.0 Safari/537.36

Browser: Chrome 106

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Tests:

Array.prototype.concat
var params = new Array(1e6).fill(null).map(_ => Math.random() + 'x') var other = [ 1, 2 ].concat(params);
spread operator
var params = new Array(1e6).fill(null).map(_ => Math.random() + 'x') var other = [ 1, 2, ...params ]
Array.prototype.flat
var params = new Array(1e6).fill(null).map(_ => Math.random() + 'x') var other = [1, 2, params].flat()