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 test_expect_success 'setup bitmap config' '
  12         git config pack.writebitmaps true &&
  13         git config pack.writebitmaphashcache true
  14 '
  15
  16 test_perf 'repack to disk' '
  17         git repack -ad
  18 '
  19
  20 test_perf 'simulated clone' '
  21         git pack-objects --stdout --all </dev/null >/dev/null
  22 '
  23
  24 test_perf 'simulated fetch' '
  25         have=$(git rev-list HEAD~100 -1) &&
  26         {
  27                 echo HEAD &&
  28                 echo ^$have
  29         } | git pack-objects --revs --stdout >/dev/null
  30 '
  31
  32 test_expect_success 'create partial bitmap state' '
  33         # pick a commit to represent the repo tip in the past
  34         cutoff=$(git rev-list HEAD~100 -1) &&
  35         orig_tip=$(git rev-parse HEAD) &&
  36
  37         # now kill off all of the refs and pretend we had
  38         # just the one tip
  39         rm -rf .git/logs .git/refs/* .git/packed-refs
  40         git update-ref HEAD $cutoff
  41
  42         # and then repack, which will leave us with a nice
  43         # big bitmap pack of the "old" history, and all of
  44         # the new history will be loose, as if it had been pushed
  45         # up incrementally and exploded via unpack-objects
  46         git repack -Ad
  47
  48         # and now restore our original tip, as if the pushes
  49         # had happened
  50         git update-ref HEAD $orig_tip
  51 '
  52
  53 test_perf 'partial bitmap' '
  54         git pack-objects --stdout --all </dev/null >/dev/null
  55 '
  56
  57 test_done