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| author | Paul Eggert <eggert@cs.ucla.edu> | 2016-12-23 12:43:46 -0800 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2016-12-23 17:22:54 -0800 |
| commit | 192d61e2828e13c4a2f1a81cd128721a229c88f9 (patch) | |
| tree | 835bafdaac9d9986e9fcac255d54c828763e1164 /src/searchutils.c | |
| parent | 4fa1971d98c79b56b466eff57117351dc395ee2a (diff) | |
| download | grep-192d61e2828e13c4a2f1a81cd128721a229c88f9.tar.gz | |
grep: speed up -wf in C locale
Problem reported by Norihiro Tanaka (Bug#22357#100).
This patch improves the performance on that benchmark on my
platform so that grep is now only about 2x slower than grep 2.26,
which means it is considerably faster than grep 2.25 and earlier.
* src/kwsearch.c (Fexecute):
Use wordchars_size to boost performance for this case.
* src/search.h, src/searchutils.c (wordchars_size): New function.
Diffstat (limited to 'src/searchutils.c')
| -rw-r--r-- | src/searchutils.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/searchutils.c b/src/searchutils.c index e0a1db33..6f6ae0b7 100644 --- a/src/searchutils.c +++ b/src/searchutils.c @@ -146,6 +146,15 @@ wordchars_count (char const *buf, char const *end, bool countall) return n; } +/* Examine the start of BUF for the longest prefix containing just + word constituents. Return the total number of bytes in the prefix. + The buffer ends at END. */ +size_t +wordchars_size (char const *buf, char const *end) +{ + return wordchars_count (buf, end, true); +} + /* If BUF starts with a word constituent, return the number of bytes used to represent it; otherwise, return zero. The buffer ends at END. */ size_t |