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Re: generation numbers

From
Junio C Hamano <gitster@pobox.com>
Date
Jul 7, 2011, 19:34 UTC
Message-ID
<7vliw9hoky.fsf@alter.siamese.dyndns.org>
In-Reply-To
<20110707185908.GB12044@sigill.intra.peff.net>
Jeff King <peff@peff.net> writes:
> You could "cheat" and instead of storing the sha1 of a blob object in
> the notes tree, use the lower 32 bits to store an actual value. I don't
> think that currently breaks any assumptions in the notes code, but it
> definitely is against the intent of it.

I highly suspect that it would break fsck rather badly. You may not even be able to repack a repository with such a notes tree.

> For a local lookup cache, I would use a fixed-size binary integer just
> to keep the lookup data structure simple (then you know the width of
> each record ahead of time). For a generation commit header, obviously we
> would go with the ascii representation as we do for other headers.
Yes.
Previous: Jeff KingNext: Jakub Narebski
Message 16 of 28 in “Speed up git tag --contains”
  1. 0/4 Speed up git tag --containsÆvar Arnfjörð Bjarmason, Jun 11, 2011
  2. 1/4 tag: speed up --contains calculationÆvar Arnfjörð Bjarmason, Jun 11, 2011
  3. 2/4 limit "contains" traversals based on commit timestampÆvar Arnfjörð Bjarmason, Jun 11, 2011
  4. 3/4 default core.clockskew variable to one dayÆvar Arnfjörð Bjarmason, Jun 11, 2011
  5. 4/4 Why is "git tag --contains" so slow?Ævar Arnfjörð Bjarmason, Jun 11, 2011
  6. Jeff KingJul 6, 2011
  7. Jeff KingJul 6, 2011
  8. Clemens BuchacherJul 6, 2011
  9. Jonathan NiederJul 6, 2011
  10. Jeff KingJul 6, 2011
  11. Jakub NarebskiJul 6, 2011
  12. Ted Ts'oJul 6, 2011
  13. Jeff KingJul 6, 2011
  14. Jakub NarebskiJul 6, 2011
  15. Jeff KingJul 7, 2011
  16. Junio C HamanoJul 7, 2011
  17. Jakub NarebskiJul 7, 2011
  18. A Large Angry SCMJul 7, 2011
  19. Junio C HamanoJul 8, 2011
  20. Jeff KingJul 8, 2011
  21. Junio C HamanoJul 6, 2011
  22. Jeff KingJul 7, 2011
  23. Jakub NarebskiJul 7, 2011
  24. csilversJan 12, 2018
  25. Jeff KingMar 3, 2018
  26. csilversMar 8, 2018
  27. Derrick StoleeMar 12, 2018
  28. Jeff KingMar 12, 2018

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