MeasureThat.net

Run results for: if(!variable) vs if(variable===undefined) performance

Go to the benchmark
Run details:
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/534.57.2 (KHTML, like Gecko) Version/5.1.7 Safari/534.57.2
Safari 5
Windows 7
Desktop
3 years ago
Test name Executions per second
!variable 14315713.0 Ops/sec
variable===undefined 6480943.0 Ops/sec
Script Preparation code:
Tests:

  • !variable

  • variable===undefined

;