MeasureThat.net

Run results for: Check function. typeof vs constructor + null check

Difference between typeof(a => {}) === 'function' and (a => {}).constructor === Function

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Run details:
Mozilla/5.0 (Android 9; Mobile; rv:109.0) Gecko/109.0 Firefox/109.0
Firefox Mobile 109
Android
Mobile
one year ago
Test name Executions per second
typeof 343670272.0 Ops/sec
constructor 92707424.0 Ops/sec
Script Preparation code:
Tests:

  • typeof

  • constructor

;