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

Object lookup performance

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Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 YaBrowser/24.6.0.0 Safari/537.36
Yandex Browser 24
Windows
Desktop
2 years ago
bool
14.7M/s
in
14.7M/s
typeof
14.3M/s
hasOwnProperty
12.9M/s
undefined
5.6M/s
View exact numbers
Test name Executions per second
✓ bool 14,695,322 Ops/sec
in 14,692,611 Ops/sec
typeof 14,261,685 Ops/sec
hasOwnProperty 12,940,538 Ops/sec
undefined 5,551,634 Ops/sec
Script Preparation code:
Tests: