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From: Jeff King <peff@peff.net>
To: Eric Wong <e@80x24.org>
Cc: git@vger.kernel.org, Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Subject: [PATCH 0/2] enable bitmap hash-cache by default
Date: Fri, 15 Mar 2019 02:21:33 -0400
Message-ID: <20190315062133.GA13385@sigill.intra.peff.net> (raw)
In-Reply-To: <20190314160256.GA1573@sigill.intra.peff.net>

On Thu, Mar 14, 2019 at 12:02:56PM -0400, Jeff King wrote:

> On Thu, Mar 14, 2019 at 09:12:54AM +0000, Eric Wong wrote:
> 
> > > The reason it defaults to off is for on-disk compatibility with JGit.
> > 
> > Right.  Our documentation seems to indicate JGit just warns (but
> > doesn't fall over), so maybe that can be considered separately.
> 
> I think it was a hard error in the beginning, but they changed it pretty
> soon after we added more flags. So it might be reasonable to just enable
> it by default (but it wouldn't hurt to double check the behavior).
> 
> I tried running t5310 (which does a back-and-forth with jgit) using this
> patch:

I dug up the actual JGit change, and it was indeed from 2014. So here's
a more complete series to handle that. There's a minor performance
mystery in the second patch, but I think it might be OK to proceed even
without solving it.

Conceptually these go on top of your patch, but they could be applied
separately.

  [1/2]: t5310: correctly remove bitmaps for jgit test
  [2/2]: pack-objects: default to writing bitmap hash-cache

 Documentation/config/pack.txt      | 4 +---
 builtin/pack-objects.c             | 2 +-
 t/perf/p5310-pack-bitmaps.sh       | 3 +--
 t/perf/p5311-pack-bitmaps-fetch.sh | 1 -
 t/t5310-pack-bitmaps.sh            | 5 ++---
 5 files changed, 5 insertions(+), 10 deletions(-)

-Peff

  reply index

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-14  4:31 [PATCH 0/3] some prune optimizations Jeff King
2019-02-14  4:35 ` [PATCH 1/3] prune: lazily perform reachability traversal Jeff King
2019-02-14 10:54   ` Eric Sunshine
2019-02-14 11:07     ` Jeff King
2019-02-14  4:37 ` [PATCH 2/3] prune: use bitmaps for " Jeff King
2019-03-09  2:49   ` bitmaps by default? [was: prune: use bitmaps for reachability traversal] Eric Wong
2019-03-10 23:39     ` Jeff King
2019-03-12  3:13       ` [PATCH] repack: enable bitmaps by default on bare repos Eric Wong
2019-03-12  9:07         ` Ævar Arnfjörð Bjarmason
2019-03-12 10:49         ` Jeff King
2019-03-12 12:05           ` Jeff King
2019-03-13  1:51           ` Eric Wong
2019-03-13 14:54             ` Jeff King
2019-03-14  9:12               ` [PATCH v3] " Eric Wong
2019-03-14 16:02                 ` Jeff King
2019-03-15  6:21                   ` Jeff King [this message]
2019-03-15  6:22                     ` [PATCH 1/2] t5310: correctly remove bitmaps for jgit test Jeff King
2019-03-15 13:25                       ` SZEDER Gábor
2019-03-15 18:36                         ` Jeff King
2019-03-15  6:25                     ` [PATCH 2/2] pack-objects: default to writing bitmap hash-cache Jeff King
2019-04-09 15:10                 ` [PATCH v3] repack: enable bitmaps by default on bare repos Ævar Arnfjörð Bjarmason
2019-04-10 22:57                   ` Jeff King
2019-04-25  7:16                     ` Junio C Hamano
2019-05-04  1:37                       ` Jeff King
2019-05-04  6:52                         ` Ævar Arnfjörð Bjarmason
2019-05-04 13:23                           ` SZEDER Gábor
2019-05-08 20:17                             ` Ævar Arnfjörð Bjarmason
2019-05-09  4:24                               ` Junio C Hamano
2019-05-07  7:45                           ` Jeff King
2019-05-07  8:12                             ` Ævar Arnfjörð Bjarmason
2019-05-08  7:11                               ` Jeff King
2019-05-08 14:20                                 ` Derrick Stolee
2019-05-08 16:13                                 ` Ævar Arnfjörð Bjarmason
2019-05-08 22:25                                   ` Jeff King
2019-05-23 11:30                     ` Jeff King
2019-05-23 12:53                       ` Derrick Stolee
2019-05-24  7:24                         ` Jeff King
2019-05-24 10:33                           ` Derrick Stolee
2019-05-23 19:26                       ` Ævar Arnfjörð Bjarmason
2019-05-24  7:27                         ` Jeff King
2019-05-24  7:55                           ` Ævar Arnfjörð Bjarmason
2019-05-24  8:26                             ` Jeff King
2019-05-24  9:01                               ` Ævar Arnfjörð Bjarmason
2019-05-24  9:29                                 ` SZEDER Gábor
2019-05-24 11:17                                   ` Ævar Arnfjörð Bjarmason
2019-05-24 11:41                                     ` SZEDER Gábor
2019-05-24 11:58                                       ` Ævar Arnfjörð Bjarmason
2019-05-24 12:34                                         ` SZEDER Gábor
2019-05-24 13:41                                           ` Ævar Arnfjörð Bjarmason
2019-05-24 11:31                       ` [PATCH] pack-bitmap: look for an uninteresting bitmap Derrick Stolee
2019-04-15 15:00   ` [PATCH 2/3] prune: use bitmaps for reachability traversal Derrick Stolee
2019-04-18 19:49     ` Jeff King
2019-04-18 20:08       ` [PATCH] t5304: add a test for pruning with bitmaps Jeff King
2019-04-20  1:01         ` Derrick Stolee
2019-04-20  3:24           ` Jeff King
2019-04-20 21:01             ` Derrick Stolee
2019-02-14  4:38 ` [PATCH 3/3] prune: check SEEN flag for reachability Jeff King

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