MeasureThat.net

Run results for: undefined vs. typeof vs. in vs. hasOwnProperty vs exists vs double bang

Object lookup performance

Go to the benchmark
Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.0.0 Safari/537.36
Chrome 106
Windows
Desktop
2 years ago
Test name Executions per second
undefined 4004198.2 Ops/sec
typeof 11502392.0 Ops/sec
in 11442678.0 Ops/sec
hasOwnProperty 10173477.0 Ops/sec
double bang 11329557.0 Ops/sec
exists 11435478.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • double bang

  • exists

;