Run results for: JS: foreach n push() reverse(); foreach n unshift()

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:82.0) Gecko/20100101 Firefox/82.0

Browser: Firefox 82

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
forEach push() then reverse()	409.9 Ops/sec
forEach unshift()	4935.3 Ops/sec

Script Preparation code:

var arr = [], arr1 = [], arr2 = [];
for (var i=0; i<100; i++){
  arr.push(Math.random());
}

Tests:

forEach push() then reverse()
arr.forEach(function(item,index){ arr1.push(item); }); arr1.reverse();
forEach unshift()
arr.forEach(function(item,index){ arr2.unshift(item); });