Run results for: xxxgfsdgsdgf

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Browser: Chrome 114

Operating system: Windows

Device Platform: Desktop

Date tested: 10 months ago

Script Preparation code:

var str = "";
var i;
var sArr = [];
var repStr = [].fill("String concatenation %", 1000).join(" ");
var repData = [].fill(1000, 0);

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("");
replace
var index = 0; str = repStr.replace(/%/g, function () { return repData[index++]; })