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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36

Browser: Chrome 130

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 7 days 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()