This  is  a patched version of zlib, modified to use Pentium-Pro-
optimized assembly code in the  deflation  algorithm.  The  files
changed/added by this patch are:

README.686 match.S

The speedup that this patch provides varies, depending on whether
the compiler used to build the original  version  of  zlib  falls
afoul  of  the PPro's speed traps. My own tests show a speedup of
around 10-20% at the default compression level, and 20-30%  using
-9,  against  a  version compiled using gcc 2.7.2.3. Your mileage
may vary.

Note that this code has been tailored for the PPro/PII in partic-
ular, and will not perform particuarly well on a Pentium.

If you are using an assembler other than GNU as, you will have to
translate match.S to use your assembler's syntax. (Have fun.)

Brian Raiter breadbox@muppetlabs.com April, 1998


Added for zlib 1.1.3:

The patches come  from  http://www.muppetlabs.com/~breadbox/soft-
ware/assembly.html

To  compile zlib with this asm file, copy match.S to the zlib di-
rectory then do:

CFLAGS="-O3 -DASMV" ./configure make OBJA=match.o