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| author | Norihiro Tanaka <noritnk@kcn.ne.jp> | 2015-10-13 09:42:57 +0900 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2015-10-16 22:42:06 -0700 |
| commit | 79d7918c889dea0d83c270cc1e8a9d8786b20102 (patch) | |
| tree | c0d587d6865e81c2a90087f642587a0a9c699b0b /src/kwsearch.c | |
| parent | 09eca14b3b7d676ce87a8a4b162265c347643d2a (diff) | |
| download | grep-79d7918c889dea0d83c270cc1e8a9d8786b20102.tar.gz | |
grep: improve performance of grep -Fw
* src/kwsearch.c (Fexecute): grep -Fw examined whether the previous
character is a word character after matching from the head of the
buffer. It is extremely slow. Now, if grep found a potential match,
it looks for the previous newline, and examines from there.
Diffstat (limited to 'src/kwsearch.c')
| -rw-r--r-- | src/kwsearch.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/kwsearch.c b/src/kwsearch.c index 5a91eb63..045ef462 100644 --- a/src/kwsearch.c +++ b/src/kwsearch.c @@ -124,7 +124,11 @@ Fexecute (char const *buf, size_t size, size_t *match_size, if (match_words) for (try = beg; ; ) { - if (wordchar (mb_prev_wc (buf, try, buf + size))) + char const *bol; + bol = beg; + while (buf < bol && bol[-1] != eol) + --bol; + if (wordchar (mb_prev_wc (bol, try, buf + size))) break; if (wordchar (mb_next_wc (try + len, buf + size))) { |