t/perf/p7820-grep-engines.sh

   1 #!/bin/sh
   2
   3 test_description="Comparison of git-grep's regex engines
   4
   5 Set GIT_PERF_7820_GREP_OPTS in the environment to pass options to
   6 git-grep. Make sure to include a leading space,
   7 e.g. GIT_PERF_7820_GREP_OPTS=' -i'. Some options to try:
   8
   9         -i
  10         -w
  11         -v
  12         -vi
  13         -vw
  14         -viw
  15 "
  16
  17 . ./perf-lib.sh
  18
  19 test_perf_large_repo
  20 test_checkout_worktree
  21
  22 for pattern in \
  23         'how.to' \
  24         '^how to' \
  25         '[how] to' \
  26         '\(e.t[^ ]*\|v.ry\) rare' \
  27         'm\(ú\|u\)lt.b\(æ\|y\)te'
  28 do
  29         for engine in basic extended perl
  30         do
  31                 if test $engine != "basic"
  32                 then
  33                         # Poor man's basic -> extended converter.
  34                         pattern=$(echo "$pattern" | sed 's/\\//g')
  35                 fi
  36                 if test $engine = "perl" && ! test_have_prereq PCRE
  37                 then
  38                         prereq="PCRE"
  39                 else
  40                         prereq=""
  41                 fi
  42                 test_perf $prereq "$engine grep$GIT_PERF_7820_GREP_OPTS '$pattern'" "
  43                         git -c grep.patternType=$engine grep$GIT_PERF_7820_GREP_OPTS -- '$pattern' >'out.$engine' || :
  44                 "
  45         done
  46
  47         test_expect_success "assert that all engines found the same for$GIT_PERF_7820_GREP_OPTS '$pattern'" '
  48                 test_cmp out.basic out.extended &&
  49                 if test_have_prereq PCRE
  50                 then
  51                         test_cmp out.basic out.perl
  52                 fi
  53         '
  54 done
  55
  56 test_done