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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-04-19 13:06:45 -0700 |
|---|---|---|
| committer | Christopher Li <sparse@chrisli.org> | 2011-04-19 13:52:12 -0700 |
| commit | 87f4a7fda3d17c85e966e2a150084d6a1cf25ab4 (patch) | |
| tree | d88774ee1cfcaf66eb8b3ceedaddf448ce8a4a1b /pre-process.c | |
| parent | 52df775e6235b81ddb44f885214f40ea562a61ea (diff) | |
| download | sparse-dev-87f4a7fda3d17c85e966e2a150084d6a1cf25ab4.tar.gz | |
Teach 'already_tokenized()' to use the stream name hash table
This replaces the "loop over all streams" with a simple hash lookup. It
makes the cost of checking for already tokenized streams basically go
away (it could be up to 5% of CPU time, almost entirely due to the
"strcmp()" of the name).
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Christopher Li <sparse@chrisli.org>
Diffstat (limited to 'pre-process.c')
| -rw-r--r-- | pre-process.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/pre-process.c b/pre-process.c index 603cc00c..6d12f173 100644 --- a/pre-process.c +++ b/pre-process.c @@ -655,10 +655,12 @@ static const char *token_name_sequence(struct token *token, int endop, struct to static int already_tokenized(const char *path) { - int i; - struct stream *s = input_streams; + int stream, next; + + for (stream = *hash_stream(path); stream >= 0 ; stream = next) { + struct stream *s = input_streams + stream; - for (i = input_stream_nr; --i >= 0; s++) { + next = s->next_stream; if (s->constant != CONSTANT_FILE_YES) continue; if (strcmp(path, s->name)) |