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Run results for:
Check object. typeof vs constructor
Difference between typeof(a => {}) === 'object' and (a => {}).constructor === Object
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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/18.0.1 Safari/605.1.15
Browser:
Safari 18
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
constructor
375.7M/s
typeof
203.7M/s
View exact numbers
Test name
Executions per second
✓
constructor
375,739,904 Ops/sec
typeof
203,712,656 Ops/sec
Script Preparation code:
var obj = {a: 'val1'};
Tests:
typeof
typeof(obj) === 'object'
constructor
obj.constructor === Object