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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36 OPR/107.0.0.0 (Edition Yx GX)

Browser: Opera 107

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

plus_operator

13.6M/s

concat()

13.2M/s

View exact numbers

Test name	Executions per second
✓ plus_operator	13,580,361 Ops/sec
concat()	13,179,005 Ops/sec

Script Preparation code:

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

Tests:

concat()
var message = string1.concat(string2);
plus_operator
var message = string1 + string2;

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

Testing the performance difference between concat() and the + operator for strings in javascript

concat()

plus_operator