Run results for: Javascript string.endsWith vs string.slice and tripple equal checking single character

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.4 Safari/605.1.15

Browser: Safari 18

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

slice

512.3M/s

endWith

79.3M/s

View exact numbers

Test name	Executions per second
✓ slice	512,264,416 Ops/sec
endWith	79,299,184 Ops/sec

Script Preparation code:

const value = "douche nation"
const ending = "n"

function compareEndsWith(val, comparator) {
  return val.endsWith(comparator)
}
function compareSliceMethod(val, comparator) {
  const thingToCompare = val.slice(-1)
  return thingToCompare === comparator
}

Tests:

endWith
const value = "douche nation" const ending = "n" compareEndsWith(value, ending)
slice
const value = "douche nation" const ending = "n" compareSliceMethod(value, ending)