Re: Official request: Please make GNU grep the default

Em 2010.08.15. 21:49, Dimitry Andric escreveu:
>    GNU grep
>    Elapsed time: 57 seconds
>
>    BSD grep (original)
>    Elapsed time: 820 seconds  (~14.4x slower than GNU grep)
>
>    BSD grep (quickfixed)
>    Elapsed time: 115 seconds  (~2.0x slower than GNU grep)
>
> It proves that getting rid of the fgetc's is certainly worthwhile, and I
> have attached a more complete patch that:
>
> - Replaces the horrendously inefficient grep_fgetln() with mostly the
>    same implementation as the libc fgetln() function.
> - Uses plain file descriptors instead of struct FILE, since the
>    buffering is done manually anyway, and it makes it easier to support
>    gzip and bzip2.
> - Let the bzip2 reader just read the file as plain data, when the
>    initial magic number doesn't match, mimicking the behaviour of GNU
>    grep.
>
> There is probably more room for optimization, but let's see if this
> survives a bunch of tests first. :)
>    
Thanks Dmitry,
I've also started to work on a similar solution but you were extremely 
fast. :) I'm checking your patch just now and will tell my experiences 
if I see any regression.

Gabor