From: mhagger@alum.mit.edu
To: Junio C Hamano <gitster@pobox.com>
Cc: Jeff King <peff@peff.net>,
git@vger.kernel.org, Michael Haggerty <mhagger@alum.mit.edu>
Subject: [PATCH 10/17] Remove ineffective optimization
Date: Thu, 23 Aug 2012 10:10:35 +0200 [thread overview]
Message-ID: <1345709442-16046-11-git-send-email-mhagger@alum.mit.edu> (raw)
In-Reply-To: <1345709442-16046-1-git-send-email-mhagger@alum.mit.edu>
From: Michael Haggerty <mhagger@alum.mit.edu>
I cannot find a scenario in which this function is called any
significant number of times, so simplify the code by always allocating
an array for return_refs rather than trying to use a stack-allocated
array for small lists.
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
---
builtin/fetch-pack.c | 14 +++-----------
1 file changed, 3 insertions(+), 11 deletions(-)
diff --git a/builtin/fetch-pack.c b/builtin/fetch-pack.c
index 0426cf4..9398059 100644
--- a/builtin/fetch-pack.c
+++ b/builtin/fetch-pack.c
@@ -527,17 +527,10 @@ static void filter_refs(struct ref **refs, int *nr_heads, char **heads)
struct ref *newlist = NULL;
struct ref **newtail = &newlist;
struct ref *ref, *next;
- struct ref *fastarray[32];
int match_pos;
- if (*nr_heads && !args.fetch_all) {
- if (ARRAY_SIZE(fastarray) < *nr_heads)
- return_refs = xcalloc(*nr_heads, sizeof(struct ref *));
- else {
- return_refs = fastarray;
- memset(return_refs, 0, sizeof(struct ref *) * *nr_heads);
- }
- }
+ if (*nr_heads && !args.fetch_all)
+ return_refs = xcalloc(*nr_heads, sizeof(struct ref *));
else
return_refs = NULL;
@@ -584,8 +577,7 @@ static void filter_refs(struct ref **refs, int *nr_heads, char **heads)
newtail = &ref->next;
}
}
- if (return_refs != fastarray)
- free(return_refs);
+ free(return_refs);
}
*refs = newlist;
}
--
1.7.11.3
next prev parent reply other threads:[~2012-08-23 8:19 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-23 8:10 [PATCH 00/17] Clean up how fetch_pack() handles the heads list mhagger
2012-08-23 8:10 ` [PATCH 01/17] t5500: add tests of error output for missing refs mhagger
2012-08-23 8:10 ` [PATCH 02/17] Rename static function fetch_pack() to http_fetch_pack() mhagger
2012-08-23 8:10 ` [PATCH 03/17] Fix formatting mhagger
2012-08-23 8:10 ` [PATCH 04/17] Name local variables more consistently mhagger
2012-08-23 8:39 ` Jeff King
2012-08-24 7:05 ` Michael Haggerty
2012-08-26 17:39 ` Junio C Hamano
2012-08-27 9:22 ` Michael Haggerty
2012-08-27 9:25 ` Jeff King
2012-08-27 16:55 ` Junio C Hamano
2012-08-27 16:50 ` Junio C Hamano
2012-08-23 8:10 ` [PATCH 05/17] Do not check the same match_pos twice mhagger
2012-08-23 8:42 ` Jeff King
2012-08-23 8:10 ` [PATCH 06/17] Let fetch_pack() inform caller about number of unique heads mhagger
2012-08-23 8:54 ` Jeff King
2012-08-25 5:05 ` Michael Haggerty
2012-08-23 8:10 ` [PATCH 07/17] Pass nr_heads to do_pack_ref() by reference mhagger
2012-08-23 8:10 ` [PATCH 08/17] Pass nr_heads to everything_local() " mhagger
2012-08-23 8:10 ` [PATCH 09/17] Pass nr_heads to filter_refs() " mhagger
2012-08-23 8:10 ` mhagger [this message]
2012-08-23 8:10 ` [PATCH 11/17] filter_refs(): do not leave gaps in return_refs mhagger
2012-08-23 8:10 ` [PATCH 12/17] filter_refs(): compress unmatched refs in heads array mhagger
2012-08-23 8:10 ` [PATCH 13/17] cmd_fetch_pack: return early if finish_connect() returns an error mhagger
2012-08-23 8:10 ` [PATCH 14/17] Report missing refs even if no existing refs were received mhagger
2012-08-23 8:10 ` [PATCH 15/17] cmd_fetch_pack(): simplify computation of return value mhagger
2012-08-23 8:10 ` [PATCH 16/17] fetch_pack(): free matching heads mhagger
2012-08-23 9:04 ` Jeff King
2012-08-23 8:10 ` [PATCH 17/17] fetch_refs(): simplify logic mhagger
2012-08-23 9:07 ` Jeff King
2012-08-25 6:37 ` Michael Haggerty
2012-08-23 9:26 ` [PATCH 00/17] Clean up how fetch_pack() handles the heads list Jeff King
2012-08-23 19:13 ` Philip Oakley
2012-08-23 19:56 ` Jeff King
2012-08-23 20:31 ` Jeff King
2012-08-25 7:05 ` Michael Haggerty
2012-09-02 7:02 ` Michael Haggerty
2012-08-23 22:09 ` Philip Oakley
2012-08-24 4:23 ` Junio C Hamano
2012-08-24 12:46 ` Philip Oakley
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