Run results for: angular.copy vs JSON.parse(JSON.stringify())

FIguring out the performance differences between using the operations in the name on copying an array of objects considering the fact that other methods of copying (slice, concat, etc.) are shallow copies and end up being by reference instead of by value.

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Browser: Chrome 128

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

angular.copy()

1.5M/s

JSON.parse(JSON.stringify())

906K/s

View exact numbers

Test name	Executions per second
✓ angular.copy()	1,516,876 Ops/sec
JSON.parse(JSON.stringify())	905,919 Ops/sec

HTML Preparation code:

<html>
  <head>
  <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.4/angular.min.js"></script>
  </head>
  <body>
  </body>
</html>

Script Preparation code:

var origArr = [
 {
  name  : "obj1",
  val   : 1,
  color : "blue"
 },
  {
  name  : "obj2",
  val   : 2,
  color : "red"
 },
  {
  name  : "obj3",
  val   : 3,
  color : "green"
 },
  {
  name  : "obj4",
  val   : 4,
  color : "orange"
 }
];

var newArr = [];

Tests:

angular.copy()
newArr = angular.copy(origArr);
JSON.parse(JSON.stringify())
newArr = JSON.parse(JSON.stringify(origArr));