Date: Fri, 3 Mar 2000 15:06:18 +0100 (CET) From: Mattias Hermansson <mattias@hemmet.chalmers.se> Message-ID: <Pine.LNX.4.21.0003031504160.6644-100000@glutus.hemmet.chalmers.se> Subject: Re: [suse-axp] Good news!
I think that 8x encoding mp3 is quite enough. When using bladeenc I only
got 1.9x. The only problem is that high quality doesn't work, but I'll try
to solve that one later...
/Mattias
On Fri, 3 Mar 2000, Alex Rhomberg wrote:
> Mattias Hermansson wrote:
> >
> > I compiled lame 3.51 with ccc. The speedincrease was exceptional, more
> > than 3 times the speed of gcc. That's how it's supposed to be. Look here:
>
> Only three times means that the code was not well optimised ;-)
>
> Check this out:
> starting point 15 us / Element (on 500 MHz ev56)
> End point after pipeline stalls caused by aliasing problems were
> removed:
> (on 666 MHz ev67)
> g++ -O3
> Timer 1 integrate & scatter: 7.462 us (pitiful 107.2 MFLOPS!)
>
> ccc -O3
> Timer 1 integrate & scatter: 1.537 us (mindboggling 520.5 MFLOPS!)
>
> (on 500 MHz ev56)
> g++ -O3
> Timer 1 integrate & scatter: 12.226 us (pitiful 65.4 MFLOPS!)
>
> ccc -O3
> Timer 1 integrate & scatter: 3.083 us (mindboggling 259.5 MFLOPS!)
>
> A slight difference of a factor 4 to 5 with well good code. The bad code
> I had before had about a factor of two difference
>
> - Alex
>
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