Run results for: this vs variable containing this

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

t = this

6.7M/s

this

6.6M/s

View exact numbers

Test name	Executions per second
✓ t = this	6,672,904 Ops/sec
this	6,602,228 Ops/sec

Script Preparation code:

aClass = class {
  constructor() {
    this.a = 1;
  }
  usethis() {
    this.a = this.a ? 0 : 1;
    this.a = this.a ? 0 : 1;
    this.a = this.a ? 0 : 1;
    this.a = this.a ? 0 : 1;
    this.a = this.a ? 0 : 1;
  }
  usevar() {
    const t = this;
    t.a = t.a ? 0 : 1;
    t.a = t.a ? 0 : 1;
    t.a = t.a ? 0 : 1;
    t.a = t.a ? 0 : 1;
    t.a = t.a ? 0 : 1;
  }
}
inst = new aClass;

Tests:

this
inst.usethis();
t = this
inst.usevar();