Run results for: aa vs bb

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:87.0) Gecko/20100101 Firefox/87.0

Browser: Firefox 87

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
A	209591.8 Ops/sec
B	474376.9 Ops/sec

Tests:

A
function isPalindrome(word) { word = word.toString().toLowerCase().replace(/[\W_]/g, ''); const array_copy = word.split(''); const reversed_array = array_copy.reverse(); return word === reversed_array.join(''); } for(i=0; i<10; i++){ isPalindrome('anA'); }
B
function isPalindrome(word) { word = word.toString().toLowerCase().replace(/[\W_]/g, ''); let left = 0; let right = word.length - 1; while(left < right) { if (word[left] !== word[right]) { return false; } left++; right--; } return true } for(i=0; i<10; i++){ isPalindrome('anA'); }