As sha1_file_name() could be performance sensitive, let's
try to make it faster by seeding the initial buffer size
to avoid any need to realloc and by using strbuf_addstr()
and strbuf_addc() instead of strbuf_addf().

Helped-by: Derrick Stolee <sto...@gmail.com>
Helped-by: Jeff Hostetler <g...@jeffhostetler.com>
Signed-off-by: Christian Couder <chrisc...@tuxfamily.org>
---
 sha1_file.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/sha1_file.c b/sha1_file.c
index f66c21b2da..1a94716962 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -323,8 +323,14 @@ static void fill_sha1_path(struct strbuf *buf, const 
unsigned char *sha1)
 
 void sha1_file_name(struct strbuf *buf, const unsigned char *sha1)
 {
-       strbuf_addf(buf, "%s/", get_object_directory());
+       const char *obj_dir = get_object_directory();
+       size_t extra = strlen(obj_dir) + 1 + GIT_MAX_HEXSZ;
 
+       if (extra > strbuf_avail(buf))
+               strbuf_grow(buf, extra);
+
+       strbuf_addstr(buf, obj_dir);
+       strbuf_addch(buf, '/');
        fill_sha1_path(buf, sha1);
 }
 
-- 
2.16.0.rc2.3.g254af8b974

Reply via email to