t/perf/p5311-pack-bitmaps-fetch.sh

   1 #!/bin/sh
   2
   3 test_description='performance of fetches from bitmapped packs'
   4 . ./perf-lib.sh
   5
   6 test_perf_default_repo
   7
   8 test_expect_success 'create bitmapped server repo' '
   9         git config pack.writebitmaps true &&
  10         git config pack.writebitmaphashcache true &&
  11         git repack -ad
  12 '
  13
  14 # simulate a fetch from a repository that last fetched N days ago, for
  15 # various values of N. We do so by following the first-parent chain,
  16 # and assume the first entry in the chain that is N days older than the current
  17 # HEAD is where the HEAD would have been then.
  18 for days in 1 2 4 8 16 32 64 128; do
  19         title=$(printf '%10s' "($days days)")
  20         test_expect_success "setup revs from $days days ago" '
  21                 now=$(git log -1 --format=%ct HEAD) &&
  22                 then=$(($now - ($days * 86400))) &&
  23                 tip=$(git rev-list -1 --first-parent --until=$then HEAD) &&
  24                 {
  25                         echo HEAD &&
  26                         echo ^$tip
  27                 } >revs
  28         '
  29
  30         test_perf "server $title" '
  31                 git pack-objects --stdout --revs \
  32                                  --thin --delta-base-offset \
  33                                  <revs >tmp.pack
  34         '
  35
  36         test_size "size   $title" '
  37                 wc -c <tmp.pack
  38         '
  39
  40         test_perf "client $title" '
  41                 git index-pack --stdin --fix-thin <tmp.pack
  42         '
  43 done
  44
  45 test_done