In memory constrained devices the use of .map() is not always possible. In such places, this should determine whether a mutation is better than creating a new array from scratch while emptying the original array, thus, keeping somewhat the same memory usage.

Compare loop performance

modified version of `map-filter vs reduce` that switches the order of operations Original was not fair comparison as it mapped all iterations not just the ones that passed the filter * added for loop

Compares slice, substr and substring to each other when there is only a start index

Compares slice, substr and substring to each other when there is only a start index