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Run results for:
Object.freeze vs Object.seal
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Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:133.0) Gecko/20100101 Firefox/133.0
Browser:
Firefox 133
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
one year ago
seal
520.8M/s
normal
520.2M/s
freeze
24.8M/s
View exact numbers
Test name
Executions per second
✓
seal
520,841,440 Ops/sec
normal
520,155,168 Ops/sec
freeze
24,801,656 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;