Add a performance comparison test which compares both case-sensitive &
case-insensitive fixed-string grep, as well as non-ASCII
case-sensitive & case-insensitive grep.
Currently only the "-i æ" performance test doesn't go through the same
kwset.[ch] codepath, see the "Even when -F..." comment in grep.c.
$ GIT_PERF_REPEAT_COUNT=10 GIT_PERF_LARGE_REPO=~/g/linux ./run p7821-grep-engines-fixed.sh
----------------------------------------------
7821.1: fixed grep int 1.75(1.39+0.34)
7821.2: basic grep int 1.68(1.38+0.28)
7821.3: extended grep int 1.75(1.41+0.29)
7821.4: perl grep int 1.73(1.40+0.30)
7821.6: fixed grep -i int 1.94(1.54+0.35)
7821.7: basic grep -i int 1.92(1.57+0.32)
7821.8: extended grep -i int 1.90(1.54+0.30)
7821.9: perl grep -i int 1.91(1.53+0.36)
7821.11: fixed grep æ 1.35(1.14+0.18)
7821.12: basic grep æ 1.34(1.16+0.16)
7821.13: extended grep æ 1.33(1.15+0.17)
7821.14: perl grep æ 1.35(1.12+0.20)
7821.16: fixed grep -i æ 0.72(0.49+0.22)
7821.17: basic grep -i æ 0.74(0.49+0.21)
7821.18: extended grep -i æ 0.72(0.48+0.22)
7821.19: perl grep -i æ 0.71(0.44+0.23)
I'm planning to make that not be the case, this performance test gives
a baseline for comparing performance before & after any such change.
See commit ("perf: add a performance comparison test of grep -G, -E
and -P", 2017-04-19) for details on the machine the above test run was
executed on.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
---
t/perf/p7821-grep-engines-fixed.sh | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
create mode 100755 t/perf/p7821-grep-engines-fixed.sh
diff --git a/t/perf/p7821-grep-engines-fixed.sh b/t/perf/p7821-grep-engines-fixed.sh
new file mode 100755
index 0000000000..66a78d225d
--- /dev/null
+++ b/t/perf/p7821-grep-engines-fixed.sh
@@ -0,0 +1,27 @@
+#!/bin/sh
+
+test_description="Comparison of fixed string grep under git-grep's regex engines"
+
+. ./perf-lib.sh
+
+test_perf_large_repo
+test_checkout_worktree
+
+for args in 'int' '-i int' 'æ' '-i æ'
+do
+ for engine in fixed basic extended perl
+ do
+ test_perf "$engine grep $args" "
+ git -c grep.patternType=$engine grep $args >'out.$engine.$args' || :
+ "
+ done
+
+ test_expect_success "assert that all engines found the same for $args" "
+ test_cmp 'out.fixed.$args' 'out.basic.$args' &&
+ test_cmp 'out.fixed.$args' 'out.extended.$args' &&
+ test_cmp 'out.fixed.$args' 'out.extended.$args' &&
+ test_cmp 'out.fixed.$args' 'out.perl.$args'
+ "
+done
+
+test_done
--
2.11.0