t/perf/p5310-pack-bitmaps.sh

   1 #!/bin/sh
   2
   3 test_description='Tests pack performance using bitmaps'
   4 . ./perf-lib.sh
   5
   6 test_perf_large_repo
   7
   8 # note that we do everything through config,
   9 # since we want to be able to compare bitmap-aware
  10 # git versus non-bitmap git
  11 #
  12 # We intentionally use the deprecated pack.writebitmaps
  13 # config so that we can test against older versions of git.
  14 test_expect_success 'setup bitmap config' '
  15         git config pack.writebitmaps true
  16 '
  17
  18 test_perf 'repack to disk' '
  19         git repack -ad
  20 '
  21
  22 test_perf 'simulated clone' '
  23         git pack-objects --stdout --all </dev/null >/dev/null
  24 '
  25
  26 test_perf 'simulated fetch' '
  27         have=$(git rev-list HEAD~100 -1) &&
  28         {
  29                 echo HEAD &&
  30                 echo ^$have
  31         } | git pack-objects --revs --stdout >/dev/null
  32 '
  33
  34 test_perf 'pack to file' '
  35         git pack-objects --all pack1 </dev/null >/dev/null
  36 '
  37
  38 test_perf 'pack to file (bitmap)' '
  39         git pack-objects --use-bitmap-index --all pack1b </dev/null >/dev/null
  40 '
  41
  42 test_expect_success 'create partial bitmap state' '
  43         # pick a commit to represent the repo tip in the past
  44         cutoff=$(git rev-list HEAD~100 -1) &&
  45         orig_tip=$(git rev-parse HEAD) &&
  46
  47         # now kill off all of the refs and pretend we had
  48         # just the one tip
  49         rm -rf .git/logs .git/refs/* .git/packed-refs &&
  50         git update-ref HEAD $cutoff &&
  51
  52         # and then repack, which will leave us with a nice
  53         # big bitmap pack of the "old" history, and all of
  54         # the new history will be loose, as if it had been pushed
  55         # up incrementally and exploded via unpack-objects
  56         git repack -Ad &&
  57
  58         # and now restore our original tip, as if the pushes
  59         # had happened
  60         git update-ref HEAD $orig_tip
  61 '
  62
  63 test_perf 'clone (partial bitmap)' '
  64         git pack-objects --stdout --all </dev/null >/dev/null
  65 '
  66
  67 test_perf 'pack to file (partial bitmap)' '
  68         git pack-objects --use-bitmap-index --all pack2b </dev/null >/dev/null
  69 '
  70
  71 test_done