MeasureThat.net

Run results for: undefined vs. typeof vs. in vs. hasOwnProperty

Object lookup performance

Go to the benchmark
Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36
Chrome 85
Mac OS X 10.15.6
Desktop
4 years ago
Test name Executions per second
undefined 4742298.0 Ops/sec
typeof 13626370.0 Ops/sec
in 13722620.0 Ops/sec
hasOwnProperty 11544659.0 Ops/sec
truthy 13109185.0 Ops/sec
local undef 6936664.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • truthy

  • local undef

;