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Run results for:
String concatenation vs array join vs array reduce
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=504641" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Android 13; Mobile; rv:122.0) Gecko/122.0 Firefox/122.0
Browser:
Firefox Mobile 122
Operating system:
Android
Device Platform:
Mobile
Date tested:
2 years ago
String concatentation
3K/s
Array join
2K/s
Array join (w/ push)
42/s
Array reduce
4/s
Array reduce trim
4/s
View exact numbers
Test name
Executions per second
✓
String concatentation
2,913 Ops/sec
Array join
1,749 Ops/sec
Array join (w/ push)
42 Ops/sec
Array reduce
4 Ops/sec
Array reduce trim
4 Ops/sec
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();