On Wednesday 19 March 2003 12:17 pm, Tom Brinkman wrote: > On Wednesday March 19 2003 10:23 am, Per Øyvind Karlsen wrote: > > why are everyone so obsessed about "optimizing" their packages? in > > most cases it only gives marginal perfomance increase and often > > introduces weird bugs and performance penalties.. > > > > here's a little example: > > http://www.mandrakeforum.org/article.php?sid=2472〈=en > > That's been my experience. The only 'speed' benefit compiling > for athlon is pyshcological ;) Building for i686 Intel proccessors > can actually be a step backwards.
Well, I have run tests on the same athlon hardware, and I can report a significant improvement. In fact in many cases it is a 2x to 4x or more improvement, especially when the ENTIRE system is recompiled. If you cannot see that level of difference, OK., I can accept that. If you do not get that level of improvement, OK. I can see that too. To each his own. I have measured the improvement here, even on athlon 850s. The nice thing is that this is a one time change, and using -mcpu i686 instead of -march will NOT affect users of lower/earlier "grade" processors. How can anyone complain about that. (Although I fully expect to see some complaints. - grin-) Bob Finch
