Run results for: void 0 vs undefined vs variable containing undefined

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36 Edg/143.0.0.0

Browser: Chrome 143

Operating system: Windows

Device Platform: Desktop

Date tested: 6 months ago

constant containing undefined

140.2M/s

void 0

139.7M/s

undefined

137.8M/s

View exact numbers

Test name	Executions per second
✓ constant containing undefined	140,245,088 Ops/sec
void 0	139,737,488 Ops/sec
undefined	137,842,304 Ops/sec

Script Preparation code:

var a = 1, u = void 0;

Tests: