Run results for: Javascript 'concat()' vs '+' for strings

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:109.0) Gecko/20100101 Firefox/115.0

Browser: Firefox 115

Operating system: Mac OS X 10.13

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
concat()	9856.6 Ops/sec
plus_operator	8691.4 Ops/sec

Script Preparation code:

var string1 = "Hello ";
var string2 = " world!";

AخA
 
var string1 = "Hello ";var string2 = " world!";

Tests:

concat()
for(i = 0; i < 1000; i++) { string1.concat(string2); }
for(i = 0; i < 1000; i++) {
string1.concat(string2);
}
plus_operator
for(i = 0; i < 1000; i++) { string1 + string2; }
for(i = 0; i < 1000; i++) {
string1 + string2;
}