Run results for: String concatenation vs array join preciselarge

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36 Edg/141.0.0.0

Browser: Chrome 141

Operating system: Windows

Device Platform: Desktop

Date tested: 9 months ago

Array join

86/s

String concatentation

6/s

View exact numbers

Test name	Executions per second
✓ Array join	86 Ops/sec
String concatentation	6 Ops/sec

Script Preparation code:

var str = "";
var i;
var sArr = new Array(1000000).fill("String concatenation. ")

Tests:

String concatentation
for (i = 1000000; i > 0; i--) { str += "String concatenation. "; }
Array join
str = sArr.join("");