Run results for: Delete vs set undefined

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Mobile Safari/537.36 EdgA/133.0.0.0

Browser: Chrome Mobile 133

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Delete

55.7M/s

Set undefined

46.3M/s

View exact numbers

Test name	Executions per second
✓ Delete	55,723,172 Ops/sec
Set undefined	46,311,920 Ops/sec

Script Preparation code:

var obj = {a:1, b:2, c:3, d:4};

Tests:

Delete
delete obj.a; delete obj.b; delete obj.c; delete obj.d;
Set undefined
obj.a = undefined; obj.b = undefined; obj.c = undefined; obj.d = undefined;