Run results for: startsWith vs ===

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36

Browser: Chrome 125

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
✓ a[i] === b[i] when a[i] strictly equals b[i]	424 Ops/sec
a[i] === b[j] when a[i] different than b[j]	245 Ops/sec
a[i].startsWith(b[j]) when a[i] different than b[j]	126 Ops/sec
a[i].startsWith(b[i]) when a[i] strictly equals b[i]	11 Ops/sec

Tests:

a[i].startsWith(b[i]) when a[i] strictly equals b[i]
{ const [a, b] = get_data() const pre = Date.now() let test = true for(let j=0; j<1000; ++j) for(let i=0; i<1000; ++i) test &= a[i].startsWith(b[i]) const post = Date.now() console.log(test === true, post - pre) }
a[i].startsWith(b[j]) when a[i] different than b[j]
{ const [a, b] = get_data() const pre = Date.now() let test = true for(let j=1; j<1000; ++j) for(let i=0; i<1000; ++i) test |= a[i].startsWith(b[j]) const post = Date.now() console.log(test === false, post - pre) }
a[i] === b[i] when a[i] strictly equals b[i]
{ const [a, b] = get_data() const pre = Date.now() let test = true for(let j=0; j<1000; ++j) for(let i=0; i<1000; ++i) test &= a[i] === b[i] const post = Date.now() console.log(test === true, post - pre) }
a[i] === b[j] when a[i] different than b[j]
{ const [a, b] = get_data() const pre = Date.now() let test = true for(let j=1; j<1000; ++j) for(let i=0; i<1000; ++i) test |= a[i] === b[j] const post = Date.now() console.log(test === false, post - pre) }