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Run results for:
Object.freeze vs Object.seal
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Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36
Browser:
Chrome 123
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
seal
5.3M/s
normal
5.1M/s
freeze
885K/s
View exact numbers
Test name
Executions per second
✓
seal
5,255,718 Ops/sec
normal
5,052,680 Ops/sec
freeze
884,884 Ops/sec
Script Preparation code:
var normal = { x: 0, y: 0 }; var freeze = Object.freeze({ x: 0, y: 0 }); var seal = Object.seal({ x: 0, y: 0 });
Tests:
normal
var t = normal.x; normal.x = normal.y; normal.y = t;
freeze
var t = freeze.x; freeze.x = freeze.y; freeze.y = t;
seal
var t = seal.x; seal.x = seal.y; seal.y = t;