Run results for: startsWith vs === (v2)

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:150.0) Gecko/20100101 Firefox/150.0

Browser: Firefox 150

Operating system: Linux

Device Platform: Desktop

Date tested: 2 months ago

=== (same values)

272/s

.startsWith() (different values)

130/s

.startsWith() (same values)

128/s

=== (different values)

115/s

View exact numbers

Test name	Executions per second
✓ === (same values)	272 Ops/sec
.startsWith() (different values)	130 Ops/sec
.startsWith() (same values)	128 Ops/sec
=== (different values)	115 Ops/sec

Script Preparation code:

function get_data (){
const a = Array(1000), b = Array(1000) 
for(let i=0; i<1000; ++i)
  {
    const v = Math.random().toPrecision(50)
    a[i] = v.slice();
    b[i] = v.slice();
  }
  return [a, b]
}

Tests:

.startsWith() (same values)
{ const [a, b] = get_data() let test = true for(let j=0; j<1000; ++j) for(let i=0; i<1000; ++i) test &= a[i].startsWith(b[i]) if (test === true) test = false; }
.startsWith() (different values)
{ const [a, b] = get_data() let test = true for(let j=1; j<1000; ++j) for(let i=0; i<1000; ++i) test |= a[i].startsWith(b[j]) if (test === true) test = false; }
=== (same values)
{ const [a, b] = get_data() let test = true for(let j=0; j<1000; ++j) for(let i=0; i<1000; ++i) test &= a[i] === b[i] if (test === true) test = false; }
=== (different values)
{ const [a, b] = get_data() let test = true for(let j=1; j<1000; ++j) for(let i=0; i<1000; ++i) test |= a[i] === b[j] if (test === true) test = false; }