Run results for: String Concatenation

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; rv:11.0) like Gecko

Browser: IE 11

Operating system: Windows

Device Platform: Other

Date tested: 7 years ago

Script Preparation code:

var str1 = "", 
    str2 = "", 
    str3 = "", 
    sArr1 = [],
sArr2 = new Array(30000);

Tests:

standard string append
// standard string append for (var i = 30000; i > 0; i--) { str1 += "String concatenation. "; }
array join
for (var i = 30000; i > 0; i--) { sArr1[i] = "String concatenation. "; } str2 = sArr1.join("");
array join 2
for (var i = 30000; i > 0; i--) { sArr2[i] = "String concatenation. "; } str3 = sArr2.join("");