Run results for: String indexing vs array indexing for string concatenation

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:138.0) Gecko/20100101 Firefox/138.0

Browser: Firefox 138

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 11 months ago

Test name	Executions per second
Array Indexing + concatenate string	2113280.5 Ops/sec
String Indexing: with array index + concatenate string	2032881.1 Ops/sec
Create loop Char Array + Array Indexing concatenation	1219287.1 Ops/sec
Split create char Array + Array Indexing concatenation	1429284.2 Ops/sec
String Indexing: with .charAt() + concatenate string	1151732096.0 Ops/sec
String Indexing: with .at() + concatenate string	1944633.5 Ops/sec
String Indexing: with .slice() + concatenate string	1052496.4 Ops/sec
Array Indexing: with array index + concatenate string foreach	1056839.6 Ops/sec
Array Indexing: with array index + concatenate string while decrement	2271489.8 Ops/sec

HTML Preparation code:

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

Script Preparation code:

const string = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quisque eget venenatis eros."
const array = string.split('');

Tests:

Array Indexing + concatenate string
let output = '' for(let i = 0; i < array.length; i++){ output += array[ i ]; }
String Indexing: with array index + concatenate string
let output = '' for(let i = 0; i < string.length; i++){ output += string[ i ]; }
Create loop Char Array + Array Indexing concatenation
const charArray = []; for(let i = 0; i < string.length; i++){ charArray.push(string[ i ]); } let output = '' for(let i = 0; i < charArray.length; i++){ output += charArray[ i ]; }
Split create char Array + Array Indexing concatenation
const charArray = string.split(''); let output = '' for(let i = 0; i < charArray.length; i++){ output += charArray[ i ]; }
String Indexing: with .charAt() + concatenate string
let output = '' for(let i = 0; i < string.length; i++){ output += string.charAt(i); }
String Indexing: with .at() + concatenate string
let output = '' for(let i = 0; i < string.length; i++){ output += string.at(i); }
String Indexing: with .slice() + concatenate string
let output = '' for(let i = 1; i <= string.length; i++){ output += string.slice(i - 1, i); }
Array Indexing: with array index + concatenate string foreach
let output = '' for(const char of array){ output += array[i] }
Array Indexing: with array index + concatenate string while decrement
let output = '' let index = array.length; while (--index){ output += array[array.length - 1 - i] }