Run results for: Immutable vs Native

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36

Browser: Chrome 67

Operating system: Linux

Device Platform: Desktop

Date tested: 6 years ago

Test name	Executions per second
native copy	181.9 Ops/sec
immutable copy	1626875.2 Ops/sec

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/immutable/3.8.1/immutable.min.js"></script>

Script Preparation code:

var native = [];
for (var i=0; i < 1000000; i++) {
  native.push(i);
}
var imm = Immutable.List(native);

Tests: