why GNU grep is faster than FreeBSD grep

fun fact: the author of gnu grep is actually a freebsd user :)

the linked email thread is also more informative than the blog post, so why not go there directly?

That post says nothing about FreeBSDs grep or why GNU grep is faster.

Two more remarks:

1. Original article on FreeBSD mailing list is from 2010;

2. Original article claims 20% speed improvement for --mmap. This option is gone since: