On Tuesday, 19 September 2006 22:56, Tim Dijkstra wrote:
> On Tue, 19 Sep 2006 21:33:14 +0200
> "Rafael J. Wysocki" <[EMAIL PROTECTED]> wrote:
>
> > Hi,
> >
> > On Tuesday, 19 September 2006 20:31, Pavel Machek wrote:
> > > > > > I'd say this is in agreement with the LZF documentation I
> > > > > > read. It says the _decompression_ should be (almost) as fast
> > > > > > as a "bare" read, and there's much less data to read if they
> > > > > > are compressed. However, _compression_ takes time which
> > > > > > offsets the gain resulting from the decreased amount of data
> > > > > > to write.
> > > > >
> > > > > Then Nigel is doing something clever and we do something stupid.
> > > >
> > > > Well, I don't think we do anything stupid. Of course you're free
> > > > to review the code anyway. ;-)
> > > >
> > > > Nigel may be using another version of the LZF algorithm which is
> > > > optimized for speed. I didn't experiment with libLZF too much,
> > > > so we're just using the default settings. Still AFAIR it is
> > > > configurable to some extent.
> > >
> > > Maybe we can just ask Nigel? ;-).
> > >
> > > > > > > - early writeout is as fast with 1% steps as it is with 20%
> > > > > > > steps. It does not really matter in my tests (this is why i
> > > > > > > did not retry compression with 20% steps).
> > > > > >
> > > > > > This is what we wanted to verify. ;-)
> > > > >
> > > > > For one machine, we'd probably need to test more machines.
> > > >
> > > > Yes, certainly.
> > >
> > > I'd go for 1% steps. If someone finds it slows his machine down,
> > > he's the one that needs to do the benchmarking.
> >
> > I guess this means we should apply the Jason's patch?
>
> Should we also make early write the default? If I followed the thread,
> I think the conclusion was that it is faster, right?
Yes, I think we can do that, but let's leave the option to swich it off, at
least for now.
[BTW, you have dropped the Cc list. Please don't.]
--
You never change things by fighting the existing reality.
R. Buckminster Fuller
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