[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Re: [RFD] optimized versions of openssl

Michael Stone writes:

> On Wed, Sep 04, 2002 at 03:35:58PM +0200, Marcelo E. Magallon wrote:
> >  The shared library is 179 kB.  Why don't you just provide the optimized
> >  versions in the same package?  Are the any stability/correctness issues
> Now for the real overachiever, what would be really cool is if you
> hacked openssl to do *runtime* detection of which optimizations to use. 

I suspect it would be "better" to do install-time selection; the
preferred way to choose is to benchmark the alternatives on a
realistic task. That isn't something most people would want to do when
they load the library, since it takes a while to do, and on a given
CPU, the results are unlikely to change over time.

Semi-static choice also makes it easier to diagnose which variant is
being used when there are problems and is probably easier to do than
run-time selection.  (The overachiever variant of this is to set up
dpkg alternatives at install-time so that the system admin can use the
existing framework to override the automatic selection.)


Reply to: