Benchmark: String concatenation vs array join vs array reduce

Script Preparation code:

var str = "";
var i;
var sArr = [];

Tests:

String concatentation
for (i = 1000; i > 0; i--) { str += "String concatenation. "; }
Array join
for (i = 1000; i > 0; i--) { sArr[i] = "String concatenation. "; } str = sArr.join("");
Array join (w/ push)
for (i = 1000; i > 0; i--) { sArr.push("String concatenation. "); } str = sArr.join("");
Array reduce
for (i = 1000; i > 0; i--) { sArr[i] = "String concatenation. "; } str = sArr.reduce((a, v) => a += `${v} `, '');
Array reduce trim
for (i = 1000; i > 0; i--) { sArr[i] = "String concatenation. "; } str = sArr.reduce((a, v) => a += `${v} `, '').trim();

Rendered benchmark preparation results:

Previous results

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Latest run results:

Run details: (Test run date: 2 months ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser/OS: Chrome 122 on Linux

String concatenation vs array join vs array reduce (version: 0)