Run results for: concat vs push

Run details:

User agent: Mozilla/5.0 (X11; Linux aarch64; rv:80.0) Gecko/20100101 Firefox/80.0

Browser: Firefox 80

Operating system: Linux

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
concat	9739.5 Ops/sec
push	8593.6 Ops/sec

Script Preparation code:

var someBigArray = [];
var anotherArray = [];

for (var i = 0; i < 1000; i++) {
  someBigArray.push(10);
  anotherArray.push(10);
}

Tests:

concat
var thing = someBigArray.concat(anotherArray);
push
var thing = [] someBigArray.forEach(function(item) { thing.push(anotherArray); }); anotherArray.forEach(function(item) { thing.push(anotherArray); });