2014-02-03 Reinhard Tartler <siret...@gmail.com>: > On Mon, Feb 3, 2014 at 2:01 PM, Jaromír Mikeš <mira.mi...@gmail.com> > wrote: > > > Please go ahead ... It looks like debian-devel would be right place. > > It sound strange that sse is redundant in amd64. > > Please elaborate, why is this strange? > > > Some time ago I played with sse optimization flags and packages build > with > > and without them > > got 30-40% difference in performance in my cases. > > > > Would be great to make it clear. > > Unfortunately not. Please clarify what exact packages did you compile > with what additional see flags on what architecture to get the 30-40% > difference. >
I did test with jconvover ... I had to dig in old emails exchanged with Free Ekanayaka. I was 4 years ago! ;) Used flags -mmmx -msse -mfpmath=sse Improvement in performance wasn't so huge ... it was about 15% ... sorry for my bad memory. Testing also haven't been very scientific just running as much as possible instances of jconvolver until first xruns in Jack. > Yes, this can make a huge difference, but using those flags is like > firing a shotgun: it may solve some symptoms, but is likely to cause but > is likely to cause > collateral damage. Sure, that's why I would like to know more. Not make big disaster instead of little improvement. mira
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