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Re: Wishlist: Source-based option - Benchmarks?

On Wednesday 19 March 2003 14:48, Matthew Miller wrote:
> Note that most everything on the stock distro *is* compiled with i686
> optimization already.

Not quite.  RPMS are compiled w/ -mcpu=i686 -march=i386, adn opt level -O2.

The higher the -O level, the larger the binary/process becomes, so it actually 
takes more register/cache space on a CPU, even though in theory it won't be 
there for that long.

Certian RPMS, such as the kernel and glibc, and openssl, which can strongly 
benifit from a -march=athlon or what not, are provided by Red Hat.  Red Hat 
(and we the community) don't discount that kernels and certian CPU intensive 
software won't get faster if it's compiled with a certian arch in mind, but 
the rest of the userland stuff, and the insane -O# flags that _could_ be 
used, will rarely give you any speed increase, w/out greatly increasing the 

Jesse Keating RHCE MCSE
Mondo DevTeam (http://www.microwerks.net/~hugo/)

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