Run results for: Spread vs concat vs unshift (fair) to join arrays test

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:100.0) Gecko/20100101 Firefox/100.0

Browser: Firefox 100

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

Script Preparation code:

var a = [1,2,3];
var b = [4,5,6];

Tests:

spread
b=[...a,...b];
concat
b=a.concat(b);
unshift (forEach)
var c = []; a.forEach(el => c.unshift(el)) b.forEach(el => c.unshift(el))
unshift (spread)
var c = []; c.unshift(...a); c.unshift(...b);
push
const a = [1, 2, 3]; const b = [4, 5, 6]; const c = []; const aLen = a.length; const bLen = b.length; let i = 0; for (; i < aLen; i++) { c.push(a[i]); } i = 0 for (; i < bLen; i++) { c.push(b[i]); }