Run results for: indexOf vs substr vs startsWith

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.95 Safari/537.36

Browser: Chrome 55

Operating system: Mac OS X 10.9.5

Device Platform: Other

Date tested: 7 years ago

Script Preparation code:

var str = "abcdefghijklmnopqrstuvwxyz";

Tests: