From: Junio C Hamano <gitster@pobox.com>
To: Jeff King <peff@peff.net>
Cc: git@vger.kernel.org
Subject: Re: [PATCH 5/7] delta_base_cache: drop special treatment of blobs
Date: Tue, 23 Aug 2016 15:18:42 -0700 [thread overview]
Message-ID: <xmqqshtvt9h9.fsf@gitster.mtv.corp.google.com> (raw)
In-Reply-To: <20160822215956.kuqnucvfodxjrawn@sigill.intra.peff.net> (Jeff King's message of "Mon, 22 Aug 2016 17:59:56 -0400")
Jeff King <peff@peff.net> writes:
> Let's run the same numbers without caring about object type
> at all (i.e., one LRU list, and always evicting whatever is
> at the head, regardless of type).
> ...
> So it seems like a clear winner, and that's what this patch
> implements.
>
> Signed-off-by: Jeff King <peff@peff.net>
> ---
Nice work. You make your readers expect some clever data structures
that may perform better than the obvious two-separate-list approach
and end up using the simplest way. Quite nice.
> sha1_file.c | 8 --------
> 1 file changed, 8 deletions(-)
>
> diff --git a/sha1_file.c b/sha1_file.c
> index c02e785..33564d6 100644
> --- a/sha1_file.c
> +++ b/sha1_file.c
> @@ -2175,14 +2175,6 @@ static void add_delta_base_cache(struct packed_git *p, off_t base_offset,
> list_entry(lru, struct delta_base_cache_entry, lru);
> if (delta_base_cached <= delta_base_cache_limit)
> break;
> - if (f->type == OBJ_BLOB)
> - release_delta_base_cache(f);
> - }
> - list_for_each(lru, &delta_base_cache_lru) {
> - struct delta_base_cache_entry *f =
> - list_entry(lru, struct delta_base_cache_entry, lru);
> - if (delta_base_cached <= delta_base_cache_limit)
> - break;
> release_delta_base_cache(f);
> }
next prev parent reply other threads:[~2016-08-23 22:18 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-22 21:57 [PATCH 0/7] tweaking the delta base cache Jeff King
2016-08-22 21:57 ` [PATCH 1/7] cache_or_unpack_entry: drop keep_cache parameter Jeff King
2016-08-23 21:45 ` Junio C Hamano
2016-08-22 21:57 ` [PATCH 2/7] clear_delta_base_cache_entry: use a more descriptive name Jeff King
2016-08-23 21:47 ` Junio C Hamano
2016-08-22 21:57 ` [PATCH 3/7] release_delta_base_cache: reuse existing detach function Jeff King
2016-08-23 21:49 ` Junio C Hamano
2016-08-24 17:41 ` Jeff King
2016-08-24 17:59 ` Junio C Hamano
2016-08-22 21:59 ` [PATCH 4/7] delta_base_cache: use list.h for LRU Jeff King
2016-08-22 23:18 ` Eric Wong
2016-08-23 0:48 ` Jeff King
2016-08-22 21:59 ` [PATCH 5/7] delta_base_cache: drop special treatment of blobs Jeff King
2016-08-23 22:18 ` Junio C Hamano [this message]
2016-08-22 22:00 ` [PATCH 6/7] delta_base_cache: use hashmap.h Jeff King
2016-08-23 22:26 ` Junio C Hamano
2016-08-22 22:01 ` [PATCH 7/7] t/perf: add basic perf tests for delta base cache Jeff King
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