Combine the definitions of $(FIND_SOURCE_FILES) and $(LIB_H) to speed
up the Makefile, as these are the two main expensive $(shell) commands
that we execute unconditionally.
When see what was in $(FOUND_SOURCE_FILES) that wasn't in $(LIB_H) via
the ad-hoc test of:
$(error $(filter-out $(LIB_H),$(filter %.h,$(ALL_SOURCE_FILES))))
$(error $(filter-out $(ALL_SOURCE_FILES),$(filter %.h,$(LIB_H))))
We'll get, respectively:
Makefile:850: *** t/helper/test-tool.h. Stop.
Makefile:850: *** . Stop.
I.e. we only had a discrepancy when it came to
t/helper/test-tool.h. In terms of correctness this was broken before,
but now works:
$ make t/helper/test-tool.hco
HDR t/helper/test-tool.h
This speeds things up a lot:
$ git -c hyperfine.hook.setup= hyperfine -L rev HEAD~1,HEAD~0 -s 'make NO_TCLTK=Y' 'make -j1 NO_TCLTK=Y' --warmup 10 -M 10
Benchmark 1: make -j1 NO_TCLTK=Y' in 'HEAD~1
Time (mean ± σ): 159.9 ms ± 6.8 ms [User: 137.2 ms, System: 28.0 ms]
Range (min … max): 154.6 ms … 175.9 ms 10 runs
Benchmark 2: make -j1 NO_TCLTK=Y' in 'HEAD~0
Time (mean ± σ): 100.0 ms ± 1.3 ms [User: 84.2 ms, System: 20.2 ms]
Range (min … max): 98.8 ms … 102.8 ms 10 runs
Summary
'make -j1 NO_TCLTK=Y' in 'HEAD~0' ran
1.60 ± 0.07 times faster than 'make -j1 NO_TCLTK=Y' in 'HEAD~1'
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
---
Makefile | 54 ++++++++++++++++++++++++++----------------------------
1 file changed, 26 insertions(+), 28 deletions(-)
diff --git a/Makefile b/Makefile
index 7dddea3caf3..d3ce0d22199 100644
--- a/Makefile
+++ b/Makefile
@@ -826,12 +826,33 @@ GENERATED_H += hook-list.h
.PHONY: generated-hdrs
generated-hdrs: $(GENERATED_H)
-LIB_H := $(sort $(patsubst ./%,%,$(shell git ls-files '*.h' ':!t/' ':!Documentation/' 2>/dev/null || \
+## Exhaustive lists of our source files, either dynamically generated,
+## or hardcoded.
+SOURCES_CMD = ( \
+ git ls-files \
+ '*.[hcS]' \
+ '*.sh' \
+ ':!*[tp][0-9][0-9][0-9][0-9]*' \
+ ':!contrib' \
+ 2>/dev/null || \
$(FIND) . \
- -name .git -prune -o \
- -name t -prune -o \
- -name Documentation -prune -o \
- -name '*.h' -print)))
+ \( -name .git -type d -prune \) \
+ -o \( -name '[tp][0-9][0-9][0-9][0-9]*' -prune \) \
+ -o \( -name contrib -type d -prune \) \
+ -o \( -name build -type d -prune \) \
+ -o \( -name 'trash*' -type d -prune \) \
+ -o \( -name '*.[hcS]' -type f -print \) \
+ -o \( -name '*.sh' -type f -print \) \
+ | sed -e 's|^\./||' \
+ )
+FOUND_SOURCE_FILES := $(shell $(SOURCES_CMD))
+
+FOUND_C_SOURCES = $(filter %.c,$(FOUND_SOURCE_FILES))
+FOUND_H_SOURCES = $(filter %.h,$(FOUND_SOURCE_FILES))
+
+COCCI_SOURCES = $(filter-out $(THIRD_PARTY_SOURCES),$(FOUND_C_SOURCES))
+
+LIB_H = $(FOUND_H_SOURCES)
LIB_OBJS += abspath.o
LIB_OBJS += add-interactive.o
@@ -2758,26 +2779,6 @@ perl/build/man/man3/Git.3pm: perl/Git.pm
$(QUIET_GEN)mkdir -p $(dir $@) && \
pod2man $< $@
-FIND_SOURCE_FILES = ( \
- git ls-files \
- '*.[hcS]' \
- '*.sh' \
- ':!*[tp][0-9][0-9][0-9][0-9]*' \
- ':!contrib' \
- 2>/dev/null || \
- $(FIND) . \
- \( -name .git -type d -prune \) \
- -o \( -name '[tp][0-9][0-9][0-9][0-9]*' -prune \) \
- -o \( -name contrib -type d -prune \) \
- -o \( -name build -type d -prune \) \
- -o \( -name 'trash*' -type d -prune \) \
- -o \( -name '*.[hcS]' -type f -print \) \
- -o \( -name '*.sh' -type f -print \) \
- | sed -e 's|^\./||' \
- )
-
-FOUND_SOURCE_FILES = $(shell $(FIND_SOURCE_FILES))
-
$(ETAGS_TARGET): $(FOUND_SOURCE_FILES)
$(QUIET_GEN)$(RM) $@+ && \
echo $(FOUND_SOURCE_FILES) | xargs etags -a -o $@+ && \
@@ -2987,9 +2988,6 @@ check: $(GENERATED_H)
exit 1; \
fi
-FOUND_C_SOURCES = $(filter %.c,$(FOUND_SOURCE_FILES))
-COCCI_SOURCES = $(filter-out $(THIRD_PARTY_SOURCES),$(FOUND_C_SOURCES))
-
%.cocci.patch: %.cocci $(COCCI_SOURCES)
$(QUIET_SPATCH) \
if test $(SPATCH_BATCH_SIZE) = 0; then \
--
2.34.1.1215.g6e154b84c77
