Run results for: Slowest character conversion

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.85 Safari/537.36

Browser: Chrome 90

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Initial call	881426600.0 Ops/sec
Multiple calls	885384700.0 Ops/sec

Script Preparation code:

const alphabet = ["A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"];


function generateItems(numberOfItems){
    const result = [];
    for ( var i = 0; i < numberOfItems ; i++ ) {
        result.push( alphabet[Math.floor(Math.random() * alphabet.length)]);
    }
    return result;
}

const list = generateItems(1000000);

Tests:

Initial call
function myFunc(){ for(let i = 0; i < list.length -1; i ++){ list[i] = list[i].toLowerCase() } }
Multiple calls
function myFunc(){ for(let i = 0; i < list.length -1; i ++){ list[i] = list[i].toLowerCase() } for(let i = 0; i < list.length -1; i ++){ list[i] = list[i].toLowerCase() } for(let i = 0; i < list.length -1; i ++){ list[i] = list[i].toLowerCase() } }

Run results for: Slowest character conversion

Initial call

Multiple calls