Run results for: Object freeze vs normal obj access

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36

Browser: Chrome 125

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

No freeze

9K/s

Freeze

7K/s

View exact numbers

Test name	Executions per second
✓ No freeze	8,504 Ops/sec
Freeze	7,171 Ops/sec

Script Preparation code:

const baseObj = { ...[ Array.from({ length: 1000 }, () => Math.random().toString(16).slice(2)) ] }

var obj = Object.assign({}, baseObj);
var frozen = Object.freeze(Object.assign({}, baseObj));

Tests:

Freeze
for (let i = 0; i < 1000; i++) { frozen[i] }
No freeze
for (let i = 0; i < 1000; i++) { obj[i] }