Run results for: array.indexof vs for

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36

Browser: Chrome 112

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

indexof 2

3.5M/s

indexof

2.8M/s

for

14K/s

View exact numbers

Script Preparation code:

var a=[];
a.length=1000;
a.fill(0);
a[500]=123;
a[998]=234;

Tests:

indexof
a.slice(a.indexOf(123),a.indexOf(234));
for
let i=0; let st=0; while(i<a.length){ if(a[i]===123){ break; st=i; } i+=1; } let ed=0; while(i<a.length){ if(a[i]===234){ break; ed=i; } i+=1; } a.slice(st,ed);
indexof 2
const st=a.indexOf(123); a.slice(st,a.slice(st).indexOf(234));