Benchmark: string concat: concat vs +

Script Preparation code:

var str1 = 'lorem ipsum', str2 = "dolor sit amet", str3 = "consectetur adipiscing elit";
var res_concat = '', res_plus = '';

Tests:

Rendered benchmark preparation results:

Previous results

Test case name	Result
concat
+

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Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36

Browser/OS: Chrome 87 on Windows

Test name	Executions per second
concat	1283669.0 Ops/sec
+	1301782.0 Ops/sec

string concat: concat vs + (version: 0)