MeasureThat.net

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

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Run details:
Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:59.0) Gecko/20100101 Firefox/59.0
Firefox 59
Windows 7
Desktop
3 years ago
Test name Executions per second
!variable 296246848.0 Ops/sec
variable===undefined 130676528.0 Ops/sec
Script Preparation code:
Tests:

  • !variable

  • variable===undefined

;