Benchmark: JavaScript String Concatenation: String Append vs String.prototype.concat vs Array.prototype.join

Script Preparation code:

const array = [];
for (let i = 0; i < 1024; i++)
  array.push(i.toString());

Tests:

Rendered benchmark preparation results:

Previous results

Latest run results:

Run details: (Test run date: 3 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36

Browser/OS: Chrome 147 on Windows

String Append

396K/s

String.prototype.concat

349K/s

Array.prototype.join

136K/s

View exact numbers

JavaScript String Concatenation: String Append vs String.prototype.concat vs Array.prototype.join (version: 1)