Run results for: 2 times startsWith vs slice

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.64 Safari/537.36

Browser: Chrome 101

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
slice	204065376.0 Ops/sec
startsWith	30275794.0 Ops/sec

Tests:

slice

const fullHouseNumber = '1/23A';

const prefix = fullHouseNumber.slice(0, 5);
  if (prefix === 'Unit ' || prefix === 'Flat ');

  const prefix2 = fullHouseNumber.slice(0, 10);
  if (prefix2 === 'Apartment ');

​x
 
const fullHouseNumber = '1/23A';​const prefix = fullHouseNumber.slice(0, 5);  if (prefix === 'Unit ' || prefix === 'Flat ');​  const prefix2 = fullHouseNumber.slice(0, 10);  if (prefix2 === 'Apartment ');

startsWith

const fullHouseNumber = '1/23A';

if (
    fullHouseNumber.startsWith('Unit ') ||
    fullHouseNumber.startsWith('Flat ')
  );

  if (fullHouseNumber.startsWith('Apartment '));

 
const fullHouseNumber = '1/23A';​if (    fullHouseNumber.startsWith('Unit ') ||    fullHouseNumber.startsWith('Flat ')  );​  if (fullHouseNumber.startsWith('Apartment '));