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 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36
Chrome 68
Mac OS X 10.13.6
Desktop
6 years ago
Test name Executions per second
undefined 1864173.4 Ops/sec
typeof 11099810.0 Ops/sec
in 11980200.0 Ops/sec
hasOwnProperty 11325001.0 Ops/sec
double bang 12793924.0 Ops/sec
exists 13032577.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • double bang

  • exists

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