Compare loop performance

Test access speed

21

Compare the new ES6 spread operator with the traditional concat() method

Test on deep equality performance

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

Compare `filter().length` vs `reduce` vs `for` loop by counting element that satisfy condition. Forked from https://www.measurethat.net/Benchmarks/Show/22294/0/filterlength-vs-reduce-vs-for