[BusyBox] Sigh... this time i attached the file (bunzip-4.c)

Manuel Novoa III mjn3 at codepoet.org
Tue Oct 21 05:45:53 UTC 2003


On Mon, Oct 20, 2003 at 11:43:47PM -0600, Manuel Novoa III wrote:
> Rob,
> 
> New version is attached.  I did not bother integrating it into
> busybox, but the necessary read interface is there.
> 
> On Fri, Oct 17, 2003 at 08:01:27PM -0600, Erik Andersen wrote:
> > On Thu Oct 16, 2003 at 09:01:52PM -0600, Manuel Novoa III wrote:
> > > Anyway, on my machine, decompressing linux-2.6.0-test7.tar.bz2
> > > to /dev/null gave the following times:
> > > 
> > >         bunzip-3.c    bzcat (system)   bunzip-3.c (patched)
> > > real    0m24.420s     0m22.725s        0m20.701s
> > > user    0m23.930s     0m22.170s        0m20.180s
> > > sys     0m0.070s      0m0.080s         0m0.140s
> 
> user time now down to about 17.6s.
> 
> Some of the streamlining optimizations done in read_bunzip() work
> for x86 (with its limited register set) but could hurt on risc.
> However, I tested on arm and bunzip-4.c was about 10% faster than
> bzcat.
> 
> Manuel

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