Run results for: index vs lastindexof

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.162 Safari/537.36

Browser: Chrome 80

Operating system: Mac OS X 10.12.6

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
lastIndexOf	15606164.0 Ops/sec
indexOf	611566016.0 Ops/sec

Tests:

lastIndexOf
var str = "Hello world, welcome to the universe."; var n = str.lastIndexOf("welcome");
indexOf
var str = "Hello world, welcome to the universe."; var n = str.indexOf("welcome");