Re: Official request: Please make GNU grep the default

Alan Cox <alc_at_cs.rice.edu> writes:
> Here is what actually puzzles me about these results.  With
> traditional I/O, even after the optimizations to bsdgrep, the system
> time for gnugrep is still less than half that of the optimized
> bsdgrep.  I haven't looked at the changes, but I would have thought
> the system time for gnugrep and bsdgrep would be almost the same.

Two reasons:

1) BSD grep does tons of unnecessary memory-to-memory copy operations in
   grep_fgetln().

2) GNU grep has its own highly optimized regex code.

DES
-- 
Dag-Erling Smørgrav - des_at_des.no