MeasureThat.net

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

Difference between typeof(a => {}) === 'object' and (a => {}).constructor === Object

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Run details:
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36
Chrome 108
Windows
Desktop
one year ago
Test name Executions per second
typeof 12307767.0 Ops/sec
constructor 3333480.5 Ops/sec
Script Preparation code:
Tests:

  • typeof

  • constructor

;