Benchmark: string.split vs toLocaleDateString("pt-PT")

Script Preparation code:

var dateStr = "2021-08-10"

Tests:

split
const [yyyy, mm, dd] = dateStr.split("/"); const result =`${dd}/${mm}/${yyyy}`;
Date toLocaleString
const result = new Date(dateStr).toLocaleString("pt-PT");
slice
const day = dateStr.slice(8, 10); const month = dateStr.slice(5, 7); const year = dateStr.slice(0, 4);
substring
const day = dateStr.substring(8, 10); const month = dateStr.substring(5, 7); const year = dateStr.substring(0, 4);

Rendered benchmark preparation results:

Previous results

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36 Edg/134.0.0.0

Browser/OS: Chrome 134 on Windows

substring

59.5M/s

slice

57.7M/s

split

9.3M/s

Date toLocaleString

226K/s

View exact numbers

string.split vs toLocaleDateString("pt-PT") (version: 1)