Run results for: delete vs null vs undefined vs void 0 vs Object.create(null)

Run details:

User agent: Mozilla/5.0 (Linux; Android 9; RMX1941 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/71.0.3578.99 Mobile Safari/537.36

Browser: Chrome Mobile 71

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
null	336273.3 Ops/sec
undefined	1026.2 Ops/sec
Object.create(null)	1033.1 Ops/sec
void 0	338212.0 Ops/sec

Tests:

null
var a = 999; for(var i = 0; i < 1000;i++) { a = null; }
undefined
var a = 999; for(var i = 0; i < 1000;i++) { a = undefined; }
Object.create(null)
var a = 999; for(var i = 0; i < 1000;i++) { a = Object.create(null); }
void 0
var a = 999; for(var i = 0; i < 1000;i++) { a = void 0; }