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 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/119.0
Firefox 119
Windows
Desktop
one year ago
Test name Executions per second
typeof 1102292352.0 Ops/sec
constructor 681794496.0 Ops/sec
Script Preparation code:
Tests:

  • typeof

  • constructor

;