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         git config pack.writebitmaphashcache true
  17 '
  18
  19 test_perf 'repack to disk' '
  20         git repack -ad
  21 '
  22
  23 test_perf 'simulated clone' '
  24         git pack-objects --stdout --all </dev/null >/dev/null
  25 '
  26
  27 test_perf 'simulated fetch' '
  28         have=$(git rev-list HEAD~100 -1) &&
  29         {
  30                 echo HEAD &&
  31                 echo ^$have
  32         } | git pack-objects --revs --stdout >/dev/null
  33 '
  34
  35 test_expect_success 'create partial bitmap state' '
  36         # pick a commit to represent the repo tip in the past
  37         cutoff=$(git rev-list HEAD~100 -1) &&
  38         orig_tip=$(git rev-parse HEAD) &&
  39
  40         # now kill off all of the refs and pretend we had
  41         # just the one tip
  42         rm -rf .git/logs .git/refs/* .git/packed-refs
  43         git update-ref HEAD $cutoff
  44
  45         # and then repack, which will leave us with a nice
  46         # big bitmap pack of the "old" history, and all of
  47         # the new history will be loose, as if it had been pushed
  48         # up incrementally and exploded via unpack-objects
  49         git repack -Ad
  50
  51         # and now restore our original tip, as if the pushes
  52         # had happened
  53         git update-ref HEAD $orig_tip
  54 '
  55
  56 test_perf 'partial bitmap' '
  57         git pack-objects --stdout --all </dev/null >/dev/null
  58 '
  59
  60 test_done