Run results for: String character looping

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:135.0) Gecko/20100101 Firefox/135.0

Browser: Firefox 135

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

String.prototype.split

221K/s

String.prototype.charAt

160K/s

String.prototype.at

151K/s

String.prototype.substring

123K/s

for-loop

122K/s

spread operator

104K/s

String.prototype.slice

99K/s

Array.from

96K/s

View exact numbers

Test name	Executions per second
✓ String.prototype.split	221,235 Ops/sec
String.prototype.charAt	160,123 Ops/sec
String.prototype.at	150,905 Ops/sec
String.prototype.substring	123,258 Ops/sec
for-loop	122,311 Ops/sec
spread operator	103,959 Ops/sec
String.prototype.slice	98,708 Ops/sec
Array.from	96,046 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

function generateRandomString(length) {
  const randomValues = new Uint8Array(length);
  window.crypto.getRandomValues(randomValues);
  const randomChars = Array.from(randomValues, (value) => String.fromCharCode(value));
  return randomChars.join('');
}

const text = generateRandomString(1000);
console.log({ text })

Tests:

String.prototype.at
const chars = [] for (let i = 0; i < text.length; i++) { chars.push(text.at(i)) } console.log(chars)
String.prototype.charAt
const chars = [] for (let i = 0; i < text.length; i++) { chars.push(text.charAt(i)) } console.log(chars)
String.prototype.split
const chars = text.split('') console.log(chars)
String.prototype.substring
const chars = [] for (let i = 0; i < text.length; i++) { chars.push(text.substring(i, i+1)) } console.log(chars)
String.prototype.slice
const chars = [] for (let i = 0; i < text.length; i++) { chars.push(text.slice(i, i+1)) } console.log(chars)
for-loop
const chars = []; for (let i = 0; i < text.length; i++) { chars.push(text[i]); } console.log(chars)
spread operator
const chars = [...text] console.log(chars)
Array.from
const chars = Array.from(text) console.log(chars)