Run results for: substring vs endsWith

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.192 Safari/537.36

Browser: Chrome 88

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
substring	1361942.0 Ops/sec
endsWith	2066172.0 Ops/sec

Script Preparation code:

var stringToCheck = '/asdasd/asdasd/asasd/asad/asdasd.html';
var stringToCheckLength = stringToCheck.length;
var stringToFind = '.html';
var stringToFindLength = 5;
var isStringFound = false;

Tests:

substring
if (stringToCheck.substring(stringToCheckLength - stringToFindLength) === stringToFind) { isStringFound = true; }
endsWith
if (stringToCheck.endsWith(stringToFind)) { isStringFound = true; }

Run results for: substring vs endsWith

Test substring vs endsWith where you have to calculate the length of the string for substring operation.

substring

endsWith