Run results for: Class property - delete vs undefined

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:90.0) Gecko/20100101 Firefox/90.0

Browser: Firefox 90

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
delete	244652.4 Ops/sec
undefined	255391.2 Ops/sec

Tests:

delete
class test { prop = 'test'; clear() { delete this.prop; } } new test().clear();
undefined
class test { prop = 'test'; clear() { this.prop = undefined; } } new test().clear();