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