Run results for: shallow copy of array - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.129 Safari/537.36

Browser: Chrome 81

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
slice	290451.6 Ops/sec
push-apply	24476.1 Ops/sec
the ...operator	247969.5 Ops/sec
for-push	275.5 Ops/sec
concat	120371.7 Ops/sec

Script Preparation code:

arr0 = [];
for(var i=0;i<10000;i++){
  arr0.push("var "+i);
}

Tests:

slice
var other = arr0.slice()
push-apply
var other = []; Array.prototype.push.apply(other, arr0);
the ...operator
var other = [...arr0];
for-push
var other = []; for(var i=0;i<arr0.length;i++){ other.push(arr0[i]); }
concat
var other = []; other = other.concat(arr0);

;