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From: Taylor Blau <me@ttaylorr.com>
To: Patrick Steinhardt <ps@pks.im>
Cc: git@vger.kernel.org, Elijah Newren <newren@gmail.com>,
	Jeff King <peff@peff.net>, Junio C Hamano <gitster@pobox.com>
Subject: Re: [PATCH 13/17] midx-write.c: enumerate `pack_int_id` values directly
Date: Mon, 8 Dec 2025 21:14:43 -0500	[thread overview]
Message-ID: <aTeGE2qplVC+kE/c@nand.local> (raw)
In-Reply-To: <aTcYfOZ4_GdIwM9b@pks.im>

On Mon, Dec 08, 2025 at 07:27:08PM +0100, Patrick Steinhardt wrote:
> On Sat, Dec 06, 2025 at 03:31:37PM -0500, Taylor Blau wrote:
> > Our `midx-write.c::fill_packs_from_midx()` function currently enumerates
> > the range [0, m->num_packs), and then shifts its index variable up by
> > `m->num_packs_in_base` to produce a valid `pack_int_id`.
> >
> > Instead, directly enumerate the range:
> >
> >     [m->num_packs_in_base, m->num_packs_in_base + m->num_packs)
> >
> > , which are the original pack_int_ids themselves as opposed to the
> > indexes of those packs relative to the MIDX layer they are contained
> > within.
>
> Sensible. I was confused a bit by the previous change because I couldn't
> quite spot the shift happening. I think this makes things a bit easier
> to read.

I'm glad that the end result was more pleasing. I have gone back and
forth whether to enumerate [0, m->num_packs) and shift, or to enumerate
the pack_int_ids directly, so it's helpful to know what style others
prefer.

Thanks,
Taylor

  reply	other threads:[~2025-12-09  2:14 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-12-06 20:30 [PATCH 00/17] midx: incremental MIDX/bitmap layer compaction Taylor Blau
2025-12-06 20:31 ` [PATCH 01/17] midx: mark `get_midx_checksum()` arguments as const Taylor Blau
2025-12-08 18:26   ` Patrick Steinhardt
2025-12-09  1:41     ` Taylor Blau
2025-12-06 20:31 ` [PATCH 02/17] midx: split `get_midx_checksum()` by adding `get_midx_hash()` Taylor Blau
2025-12-08 18:25   ` Patrick Steinhardt
2025-12-09  1:42     ` Taylor Blau
2025-12-09  1:50       ` Taylor Blau
2025-12-09  6:27         ` Patrick Steinhardt
2025-12-06 20:31 ` [PATCH 03/17] builtin/multi-pack-index.c: make '--progress' a common option Taylor Blau
2025-12-06 20:31 ` [PATCH 04/17] git-multi-pack-index(1): remove non-existent incompatibility Taylor Blau
2025-12-06 20:31 ` [PATCH 05/17] git-multi-pack-index(1): align SYNOPSIS with 'git multi-pack-index -h' Taylor Blau
2025-12-06 20:31 ` [PATCH 06/17] t/t5319-multi-pack-index.sh: fix copy-and-paste error in t5319.39 Taylor Blau
2025-12-06 20:31 ` [PATCH 07/17] midx-write.c: don't use `pack_perm` when assigning `bitmap_pos` Taylor Blau
2025-12-08 18:26   ` Patrick Steinhardt
2025-12-09  1:59     ` Taylor Blau
2025-12-06 20:31 ` [PATCH 08/17] midx-write.c: introduce `struct write_midx_opts` Taylor Blau
2025-12-08 18:26   ` Patrick Steinhardt
2025-12-09  2:04     ` Taylor Blau
2025-12-06 20:31 ` [PATCH 09/17] midx: do not require packs to be sorted in lexicographic order Taylor Blau
2025-12-08 18:26   ` Patrick Steinhardt
2025-12-09  2:07     ` Taylor Blau
2025-12-09  2:11       ` Taylor Blau
2025-12-06 20:31 ` [PATCH 10/17] git-compat-util.h: introduce `u32_add()` Taylor Blau
2025-12-08 18:27   ` Patrick Steinhardt
2025-12-09  2:13     ` Taylor Blau
2025-12-06 20:31 ` [PATCH 11/17] midx-write.c: introduce `midx_pack_perm()` helper Taylor Blau
2025-12-06 20:31 ` [PATCH 12/17] midx-write.c: extract `fill_pack_from_midx()` Taylor Blau
2025-12-06 20:31 ` [PATCH 13/17] midx-write.c: enumerate `pack_int_id` values directly Taylor Blau
2025-12-08 18:27   ` Patrick Steinhardt
2025-12-09  2:14     ` Taylor Blau [this message]
2025-12-06 20:31 ` [PATCH 14/17] midx-write.c: factor fanout layering from `compute_sorted_entries()` Taylor Blau
2025-12-06 20:31 ` [PATCH 15/17] t/helper/test-read-midx.c: plug memory leak when selecting layer Taylor Blau
2025-12-08 18:27   ` Patrick Steinhardt
2025-12-09  2:16     ` Taylor Blau
2025-12-06 20:31 ` [PATCH 16/17] midx: implement MIDX compaction Taylor Blau
2025-12-09  7:21   ` Patrick Steinhardt
2025-12-06 20:31 ` [PATCH 17/17] midx: enable reachability bitmaps during " Taylor Blau
2025-12-09  7:21   ` Patrick Steinhardt

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