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Run results for:
normal vs Object.freeze vs Object.seal performance
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Run details:
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 18_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.5 Mobile/15E148 Safari/604.1
Browser:
Mobile Safari 18
Operating system:
iOS 18.5
Device Platform:
Mobile
Date tested:
one year ago
normal
442.3M/s
freeze
18.1M/s
seal
17.0M/s
View exact numbers
Test name
Executions per second
✓
normal
442,330,592 Ops/sec
freeze
18,118,832 Ops/sec
seal
16,982,780 Ops/sec
Tests:
normal
var normal = { x: 0, y: 0 };
freeze
var freeze = Object.freeze({ x: 0, y: 0 });
seal
var seal = Object.seal({ x: 0, y: 0 });