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Re: What's the difference between `git show branch:file | diff -u - file` vs `git diff branch file`?

From
Marat Radchenko <marat@slonopotamus.org>
Date
Aug 29, 2011, 14:48 UTC
Message-ID
<loom.20110829T155805-331@post.gmane.org>
In-Reply-To
<CACsJy8DMqjMfb5wVMnsrZhP8yv2rF1wyQ6LM6b-PVcYY1SXkcQ@mail.gmail.com>
Nguyen Thai Ngoc Duy <pclouds <at> gmail.com> writes:
>  - is "file" above at top repo, or is it actually very/deep/path/to/a/file?
3 levels deep. Most parent dir (one after repo root) contains 20k files.
>  - how many entries in the tree that contain "file"?
Sorry, didn't understand this.
>  - how is "git ls-files | wc -l"?

$ time git ls-files | wc -l 603137

real 0m0.417s user 0m0.440s sys 0m0.060s

>  - how about "time git diff branch another-branch -- file >/dev/null"?
> That'd remove unpack-trees code.

Pretty fast: $ time git diff branch:file other_branch:file > /dev/null

real 0m0.278s user 0m0.210s sys 0m0.060s

One more test: git diff HEAD branch -- file > /dev/null

real 0m0.276s user 0m0.240s sys 0m0.030s

So the only troubled variant is `git diff branch -- file`.
Previous: Nguyen Thai Ngoc DuyNext: Nguyen Thai Ngoc Duy
Message 14 of 56 in “What's the difference between `git show branch:file | diff -u - file` vs `git diff branch file`?”
  1. Marat RadchenkoAug 23, 2011
  2. Michael J GruberAug 23, 2011
  3. Marat RadchenkoAug 23, 2011
  4. Michael WittenAug 23, 2011
  5. Michael J GruberAug 23, 2011
  6. Marat RadchenkoAug 23, 2011
  7. Junio C HamanoAug 23, 2011
  8. Marat RadchenkoAug 23, 2011
  9. Michael J GruberAug 23, 2011
  10. Marat RadchenkoAug 25, 2011
  11. Junio C HamanoAug 25, 2011
  12. Marat RadchenkoAug 26, 2011
  13. Nguyen Thai Ngoc DuyAug 29, 2011
  14. Marat RadchenkoAug 29, 2011
  15. Nguyen Thai Ngoc DuyAug 29, 2011
  16. Junio C HamanoAug 29, 2011
  17. Junio C HamanoAug 29, 2011
  18. Junio C HamanoAug 29, 2011
  19. Junio C HamanoAug 29, 2011
  20. 0/3 Un-pessimize "diff-index $commit -- $pathspec"Junio C Hamano, Aug 29, 2011
  21. 1/3 traverse_trees(): allow pruning with pathspecJunio C Hamano, Aug 29, 2011
  22. Nguyen Thai Ngoc DuyAug 30, 2011
  23. Junio C HamanoAug 30, 2011
  24. Nguyen Thai Ngoc DuyAug 31, 2011
  25. Michael HaggertyOct 9, 2011
  26. Nguyen Thai Ngoc DuyOct 9, 2011
  27. Michael HaggertyOct 10, 2011
  28. 2/3 unpack-trees: allow pruning with pathspecJunio C Hamano, Aug 29, 2011
  29. Nguyen Thai Ngoc DuyAug 30, 2011
  30. Junio C HamanoAug 30, 2011
  31. David Michael BarrAug 30, 2011
  32. 3/3 diff-index: pass pathspec down to unpack-trees machineryJunio C Hamano, Aug 29, 2011
  33. Jonathan NiederJan 11, 2012
  34. Junio C HamanoJan 11, 2012
  35. Nguyen Thai Ngoc DuyJan 11, 2012
  36. Nguyen Thai Ngoc DuyJan 11, 2012
  37. Junio C HamanoJan 11, 2012
  38. tree_entry_interesting: make recursive mode defaultNguyễn Thái Ngọc Duy, Jan 12, 2012
  39. Junio C HamanoJan 12, 2012
  40. Nguyen Thai Ngoc DuyJan 12, 2012
  41. 1/2 Document limited recursion pathspec matching with wildcardsNguyễn Thái Ngọc Duy, Jan 14, 2012
  42. 2/2 tree_entry_interesting: make recursive mode defaultNguyễn Thái Ngọc Duy, Jan 14, 2012
  43. Junio C HamanoJan 15, 2012
  44. Nguyen Thai Ngoc DuyJan 15, 2012
  45. Junio C HamanoJan 16, 2012
  46. Nguyen Thai Ngoc DuyJan 18, 2012
  47. Junio C HamanoJan 15, 2012
  48. Nguyen Thai Ngoc DuyJan 15, 2012
  49. Linus TorvaldsAug 29, 2011
  50. Junio C HamanoAug 29, 2011
  51. Linus TorvaldsAug 29, 2011
  52. Junio C HamanoAug 29, 2011
  53. Marat RadchenkoAug 30, 2011
  54. Junio C HamanoAug 31, 2011
  55. Michael J GruberAug 30, 2011
  56. Junio C HamanoAug 30, 2011

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