Run results for: Testing lastIndexOf vs split+pop

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36

Browser: Chrome 137

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

lastIndexOf

708K/s

split+pop

702K/s

View exact numbers

Test name	Executions per second
✓ lastIndexOf	708,085 Ops/sec
split+pop	701,624 Ops/sec

Script Preparation code:

var str="abc:cde:def:efg:ghi";

Tests:

lastIndexOf
const lastIndexOfDot = str.lastIndexOf(':'); let snip; if (lastIndexOfDot != -1) { snip = str.substr(lastIndexOfDot + 1); } console.log(snip);
split+pop
let snip = str.split(':').pop(); console.log(snip);