Add benchmarks

[theodesp]

Add benchmark testing

[pbgnz]

Hi Theofanis,

I am interested in helping you benchmark your library.

I was thinking of using the Go testing package built-in benchmark facility to test your code, similar to this post.

What do you think ?

[theodesp]

Sure go ahead. Try to get a few extra hints from this guide here: https://github.com/golang/go/wiki/Performance

For example: heap allocations and unnecessary escapes Garbage collection

[theodesp]

@theodesp Any luck with any benchmarks?

[spinales]

It can?