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Run results for:
frozen VS unfrozen object iteration times
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Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.2 Safari/605.1.15
Browser:
Safari 26
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
4 months ago
Test name
Executions per second
unfrozen iteration
98646272.0 Ops/sec
frozen iteration
9072917.0 Ops/sec
Script Preparation code:
var o1 = {a: 1}; var o2 = {a: 1}; Object.freeze(o2);
Tests:
unfrozen iteration
for(var key in o1);
frozen iteration
for(var key in o2);