Benchmark: String slice vs. array slice

Script Preparation code:

var str = ""
var arr = []
for (let i = 0; i < 100000; ++i) {
    str += 'ABC::';
    arr.push('ABC');
}

Tests:

String slice
function process(s){ return s.slice(0,s.lastIndexOf(':')) } while (str.length) { str = process(str); }
Array slice
function process(a){ return a.slice(0,a.length-2) } while (arr.length) { arr = process(arr); }
Array with creation
let str = "" for (let i = 0; i < 100000; ++i) { str += 'ABC:'; } function process(a){ return a.slice(0,a.length-2) } while (arr.length) { arr = process(arr); }
String with creation
let str = "" for (let i = 0; i < 100000; ++i) { str += 'ABC:'; } function process(s){ return s.slice(0,s.lastIndexOf(':')) } while (str.length) { str = process(str); }

Rendered benchmark preparation results:

Previous results

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Latest run results:

Run details: (Test run date: 11 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/113.0

Browser/OS: Firefox 113 on Mac OS X 10.15

String slice vs. array slice (version: 0)