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) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36
Chrome 75
Windows
Desktop
5 years ago
Test name Executions per second
typeof 10615161.0 Ops/sec
constructor 3168902.8 Ops/sec
Script Preparation code:
Tests:

  • typeof

  • constructor