Run results for: Copy fields and values from object to map: Map(Object.entries) vs cycle with copy1

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36

Browser: Chrome 87

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Use Map and Object entries	591282.4 Ops/sec
Use cycle with copy of object	152411.6 Ops/sec

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.js'></script>

Script Preparation code:

var testObject = {
  a: "1",
  b: "2",
  c: "3",
  d: "4",
  e: "5",
  f: "6",
  g: "7",
  h: "8",
  i: "9",
  j: "10"
};

Tests:

Use Map and Object entries
var result = new Map(Object.entries(testObject));
Use cycle with copy of object
var result = new Map(); $.each(JSON.parse(JSON.stringify(testObject)), function (key, value) { result.set(key, value); });