isArray or array. lenght?

You don't need to make add for loops in your test scenarios, the benchmark does it itself.

Performance comparison of ways to find if an array contains a value

FIguring out the performance differences between using the operations in the name on copying an array of objects considering the fact that other methods of copying (slice, concat, etc.) are shallow copies and end up being by reference instead of by value.

Numbers instead of strings

compare some iterated array from size