perf: accommodate for MacOSX

As this developer has no access to MacOSX developer setups anymore,
Travis becomes the best bet to run performance tests on that OS.

However, on MacOSX /usr/bin/time is that good old BSD executable that
no Linux user cares about, as demonstrated by the perf-lib.sh's use
of GNU-ish extensions. And by the hard-coded path.

Let's just work around this issue by using gtime on MacOSX, the
Homebrew-provided GNU implementation onto which pretty much every
MacOSX power user falls back anyway.

To help other developers use Travis to run performance tests on
MacOSX, the .travis.yml file now sports a commented-out line that
installs GNU time via Homebrew.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Reviewed-by: Lars Schneider <larsxschneider@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/.travis.yml b/.travis.yml
index c20ec540c8488e1d3b589a66a69ba269342159d7..c2b76f9b7ea0bfa76720d3c1867ad148c35fa858 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -82,6 +82,8 @@ before_install:
       brew tap homebrew/binary --quiet
       brew_force_set_latest_binary_hash perforce
       brew_force_set_latest_binary_hash perforce-server
+      # Uncomment this if you want to run perf tests:
+      # brew install gnu-time
       brew install git-lfs perforce-server perforce gettext
       brew link --force gettext
       ;;

diff --git a/t/perf/perf-lib.sh b/t/perf/perf-lib.sh
index 18c363ea7f384ee625b0efc162dc081f51a3780f..773f955d4a251e768b8bc39f7e05161936fda1f5 100644 (file)
--- a/t/perf/perf-lib.sh
+++ b/t/perf/perf-lib.sh
@@ -127,11 +127,15 @@ test_checkout_worktree () {
 # Performance tests should never fail.  If they do, stop immediately
 immediate=t
 
+# Perf tests require GNU time
+case "$(uname -s)" in Darwin) GTIME="${GTIME:-gtime}";; esac
+GTIME="${GTIME:-/usr/bin/time}"
+
 test_run_perf_ () {
        test_cleanup=:
        test_export_="test_cleanup"
        export test_cleanup test_export_
-       /usr/bin/time -f "%E %U %S" -o test_time.$i "$SHELL" -c '
+       "$GTIME" -f "%E %U %S" -o test_time.$i "$SHELL" -c '
 . '"$TEST_DIRECTORY"/test-lib-functions.sh'
 test_export () {
        [ $# != 0 ] || return 0