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| author | Tay Ray Chuan <rctay89@gmail.com> | 2011-07-12 14:10:27 +0800 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2011-07-12 09:30:00 -0700 |
| commit | 86abba801575892a8a2b161aa29518c1ed05e1f1 (patch) | |
| tree | e2a5a2264646e2bbde43dfd8bff10369daec7c5b /xdiff/xutils.h | |
| parent | 9f37c275938e1fbca7165872dad039874add09cd (diff) | |
| download | git-86abba801575892a8a2b161aa29518c1ed05e1f1.tar.gz | |
xdiff/xprepare: use a smaller sample size for histogram diff
For histogram diff, we can afford a smaller sample size and thus a
poorer estimate of the number of lines, as the hash table (rhash) won't
be filled up/grown. This is safe as the final count of lines (xdf.nrecs)
will be updated correctly anyway by xdl_prepare_ctx().
This gives us a small boost in performance.
Signed-off-by: Tay Ray Chuan <rctay89@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'xdiff/xutils.h')
| -rw-r--r-- | xdiff/xutils.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/xdiff/xutils.h b/xdiff/xutils.h index 674a657b08..714719a89c 100644 --- a/xdiff/xutils.h +++ b/xdiff/xutils.h @@ -33,7 +33,7 @@ void xdl_cha_free(chastore_t *cha); void *xdl_cha_alloc(chastore_t *cha); void *xdl_cha_first(chastore_t *cha); void *xdl_cha_next(chastore_t *cha); -long xdl_guess_lines(mmfile_t *mf); +long xdl_guess_lines(mmfile_t *mf, long sample); int xdl_recmatch(const char *l1, long s1, const char *l2, long s2, long flags); unsigned long xdl_hash_record(char const **data, char const *top, long flags); unsigned int xdl_hashbits(unsigned int size); |