Run results for: String concat methods

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36

Browser: Chrome 112

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
reduce	187992.0 Ops/sec
append-with-foreach-arrow	135443.8 Ops/sec
append-with-forof	119324.6 Ops/sec
append-with-for	8439.1 Ops/sec
string-concat	128181.7 Ops/sec
array-join	69719.4 Ops/sec

Script Preparation code:

var character_pool = "abcdefghijklmnopqrstuvwxyz";
var characters = [];
for (var i = 0; i < 1024; i++) {
  var idx = Math.floor(Math.random() * character_pool.length);
  characters.push(character_pool[idx])
}

Tests:

reduce
characters.reduce((acc, c) => acc + c, "")
append-with-foreach-arrow
var result = "" characters.forEach((c) => result += c)
append-with-forof
var result = "" for (var c of characters) { result += c }
append-with-for
var result = "" for (var i = 0; i < characters.length; i++) { result += characters[i] }
string-concat
"".concat(...characters)
array-join
characters.join("")

Run results for: String concat methods

reduce

append-with-foreach-arrow

append-with-forof

append-with-for

string-concat

array-join