Run results for: Symbol in obj vs obj instanceof constructor 2

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:131.0) Gecko/20100101 Firefox/131.0

Browser: Firefox 131

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Symbol in obj

65K/s

obj instanceof constructor

9K/s

View exact numbers

Test name	Executions per second
✓ Symbol in obj	65,091 Ops/sec
obj instanceof constructor	9,156 Ops/sec

Script Preparation code:

let Sym = Symbol("test")
class test {
  [Sym]
}
let obj = new test

Tests: