Benchmark: join with spread vs concat

Script Preparation code:

var a = ['a',1,true];
var b = ['b',2,false];

Tests:

Rendered benchmark preparation results:

Previous results

Test case name	Result
concat
spread

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Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4214.2 Safari/537.36

Browser/OS: Chrome 86 on Mac OS X 10.14.6

Test name	Executions per second
concat	2912163.0 Ops/sec
spread	4315220.0 Ops/sec

join with spread vs concat (version: 0)