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

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/120.0.0.0 Safari/537.36
Chrome 120
Windows
Desktop
2 years ago
typeof
4.7M/s
in
4.6M/s
bool
4.5M/s
hasOwnProperty
3.9M/s
undefined
1.7M/s
View exact numbers
Test name Executions per second
✓ typeof 4,681,448 Ops/sec
in 4,579,724 Ops/sec
bool 4,492,936 Ops/sec
hasOwnProperty 3,946,265 Ops/sec
undefined 1,722,784 Ops/sec
Script Preparation code:
Tests: