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.

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
!var1 13936555.0 Ops/sec
variable===undefined 6393478.0 Ops/sec
if(var1 || var1==="" || var1===0); 5661963.5 Ops/sec
Script Preparation code:
Tests:

  • !var1

  • var1===undefined

  • var1 || var1==="" || var1===0

  • !(1 in arguments)

  • !arguments[1]

  • !object["var"]

  • !object[0]

  • !arguments["string"]

;