On Sun, 7 Sep 2008, Jon Smirl wrote:
> On 9/7/08, Linus Torvalds  wrote:

quoted text
> >

> >

> >  On Sat, 6 Sep 2008, Jon Smirl wrote:

> >  >

> >

> > > When I was playing with those giant Mozilla packs speed of zlib wasn't

> >  > a big problem. Number one problem was the repack process exceeding 3GB

> >  > which forced me to get 64b hardware and 8GB of memory. If you start

> >  > swapping in a repack, kill it, it will probably take a month to

> >  > finish.

> >

> >

> > .. and you'd make things much much WORSE?

>

> My observations on the Mozilla packs indicated that the problems were

> elsewhere in git, not in the decompression algorithms. Why does a

> single 2000 delta chain take 15% of the entire pack time? Something

> isn't right when long chains are processed which triggers far more

> decompressions than needed.

Please have a look at commit eac12e2d4d7f.  This fix improved things for

my gcc repack tests.
Nicolas

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