Run results for: concat vs plus string

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.132 Safari/537.36 OPR/63.0.3368.71

Browser: Opera 63

Operating system: Windows

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
Array.prototype.concat	1013004736.0 Ops/sec
spread operator	1011800320.0 Ops/sec

Tests:

Array.prototype.concat
var str1 = "Hello "; var str2 = "world!"; var res = str1.concat(str2);
spread operator
var str1 = "Hello "; var str2 = "world!"; var res = str1+str2;