t/perf/p5326-multi-pack-bitmaps.sh

   1 #!/bin/sh
   2
   3 test_description='Tests performance using midx bitmaps'
   4 . ./perf-lib.sh
   5 . "${TEST_DIRECTORY}/perf/lib-bitmap.sh"
   6
   7 test_bitmap () {
   8         local enabled="$1"
   9
  10         test_expect_success "remove existing repo (lookup=$enabled)" '
  11                 rm -fr * .git
  12         '
  13
  14         test_perf_large_repo
  15
  16         # we need to create the tag up front such that it is covered by the repack and
  17         # thus by generated bitmaps.
  18         test_expect_success 'create tags' '
  19                 git tag --message="tag pointing to HEAD" perf-tag HEAD
  20         '
  21
  22         test_expect_success "use lookup table: $enabled" '
  23                 git config pack.writeBitmapLookupTable '"$enabled"'
  24         '
  25
  26         test_expect_success "start with bitmapped pack (lookup=$enabled)" '
  27                 git repack -adb
  28         '
  29
  30         test_perf "setup multi-pack index (lookup=$enabled)" '
  31                 git multi-pack-index write --bitmap
  32         '
  33
  34         test_expect_success "drop pack bitmap (lookup=$enabled)" '
  35                 rm -f .git/objects/pack/pack-*.bitmap
  36         '
  37
  38         test_full_bitmap
  39
  40         test_expect_success "create partial bitmap state (lookup=$enabled)" '
  41                 # pick a commit to represent the repo tip in the past
  42                 cutoff=$(git rev-list HEAD~100 -1) &&
  43                 orig_tip=$(git rev-parse HEAD) &&
  44
  45                 # now pretend we have just one tip
  46                 rm -rf .git/logs .git/refs/* .git/packed-refs &&
  47                 git update-ref HEAD $cutoff &&
  48
  49                 # and then repack, which will leave us with a nice
  50                 # big bitmap pack of the "old" history, and all of
  51                 # the new history will be loose, as if it had been pushed
  52                 # up incrementally and exploded via unpack-objects
  53                 git repack -Ad &&
  54                 git multi-pack-index write --bitmap &&
  55
  56                 # and now restore our original tip, as if the pushes
  57                 # had happened
  58                 git update-ref HEAD $orig_tip
  59         '
  60
  61         test_partial_bitmap
  62 }
  63
  64 test_bitmap false
  65 test_bitmap true
  66
  67 test_done