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author | Masahiro Yamada <masahiroy@kernel.org> | 2020-08-22 23:56:09 +0900 |
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committer | Masahiro Yamada <masahiroy@kernel.org> | 2020-08-27 00:44:33 +0900 |
commit | 8a685db32f2b3495c91efab6e9462c2fd934778f (patch) | |
tree | 19cf8b56d9cca1837b7d4f42c9d6593f9f54e224 /scripts | |
parent | 23cd88c91343349a0d67a227f9effdde0cbe09af (diff) | |
download | linux-8a685db32f2b3495c91efab6e9462c2fd934778f.tar.gz linux-8a685db32f2b3495c91efab6e9462c2fd934778f.tar.bz2 linux-8a685db32f2b3495c91efab6e9462c2fd934778f.zip |
gen_compile_commands: parse only the first line of .*.cmd files
After the allmodconfig build, this script takes about 5 sec on my
machine. Most of the run-time is consumed for needless regex matching.
We know the format of .*.cmd file; the first line is the build command.
There is no need to parse the rest.
With this optimization, now it runs 4 times faster.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Diffstat (limited to 'scripts')
-rwxr-xr-x | scripts/gen_compile_commands.py | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/scripts/gen_compile_commands.py b/scripts/gen_compile_commands.py index c458696ef3a7..1bcf33a93cb9 100755 --- a/scripts/gen_compile_commands.py +++ b/scripts/gen_compile_commands.py @@ -125,11 +125,8 @@ def main(): filepath = os.path.join(dirpath, filename) with open(filepath, 'rt') as f: - for line in f: - result = line_matcher.match(line) - if not result: - continue - + result = line_matcher.match(f.readline()) + if result: try: entry = process_line(directory, dirpath, result.group(1), result.group(2)) |