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_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36
Chrome 139
Mac OS X 10.15.7
Desktop
11 months ago
in
236.2M/s
undefined
232.2M/s
bool
224.8M/s
typeof
224.5M/s
hasOwnProperty
132.4M/s
View exact numbers
Test name Executions per second
✓ in 236,166,256 Ops/sec
undefined 232,153,696 Ops/sec
bool 224,847,184 Ops/sec
typeof 224,544,160 Ops/sec
hasOwnProperty 132,364,448 Ops/sec
Script Preparation code:
Tests: