MeasureThat.net

Run results for: Testing var undefined comparison & checking it via object/array.

(1 in arguments) means to check if "2nd var" parameter is defined in arguments list in a function.

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Run details:
Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
IE 9
Windows 7
Desktop
3 years ago
Test name Executions per second
!var1 6880152.0 Ops/sec
variable===undefined 4672569.0 Ops/sec
if(var1 || var1==="" || var1===0); 4045243.5 Ops/sec
Script Preparation code:
Tests:

  • !var1

  • var1===undefined

  • var1 || var1==="" || var1===0

  • !(1 in arguments)

  • !arguments[1]

  • !object["var"]

  • !object[0]

  • !arguments["string"]

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