From: Junio C Hamano <gitster@pobox•com>
To: Jeff King <peff@peff•net>
Cc: "René Scharfe" <l.s.r@web•de>, "Git List" <git@vger•kernel.org>
Subject: Re: [PATCH 0/3] commit: convert pop_most_recent_commit() to prio_queue
Date: Wed, 16 Jul 2025 07:49:19 -0700 [thread overview]
Message-ID: <xmqqldoodwcw.fsf@gitster.g> (raw)
In-Reply-To: <20250716051533.GD1396022@coredump.intra.peff.net> (Jeff King's message of "Wed, 16 Jul 2025 01:15:33 -0400")
Jeff King <peff@peff•net> writes:
> On Tue, Jul 15, 2025 at 05:07:38PM -0700, Junio C Hamano wrote:
>
>> René Scharfe <l.s.r@web•de> writes:
>>
>> > Use prio_queue to improve worst-case performance at the cost of slightly
>> > worse best-case performance. Then add and use prio_queue_replace() to
>> > recover that loss.
>>
>> Would change in the tiebreaking behaviour (aka sort stability) also
>> a cost of this change, as this swaps use of sorted linearly linked
>> list with priority queue?
>
> The prio_queue uses insertion order as a tie-breaker for stability (with
> earlier entries coming first). For building the initial queue from the
> list, I think that is obviously fine (we feed them in sorted order,
> which the prio queue will retain).
OK, then everything looks great. Thanks.
next prev parent reply other threads:[~2025-07-16 14:49 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-15 14:35 [PATCH 0/3] commit: convert pop_most_recent_commit() to prio_queue René Scharfe
2025-07-15 14:51 ` [PATCH 1/3] " René Scharfe
2025-07-15 19:23 ` Junio C Hamano
2025-07-15 20:47 ` Justin Tobler
2025-07-16 9:39 ` René Scharfe
2025-07-16 5:05 ` Jeff King
2025-07-16 9:39 ` René Scharfe
2025-07-17 8:22 ` René Scharfe
2025-07-19 6:55 ` Jeff King
2025-07-19 6:57 ` Jeff King
2025-07-19 11:15 ` René Scharfe
2025-07-20 0:03 ` Jeff King
2025-07-20 1:22 ` Junio C Hamano
2025-07-16 22:23 ` Junio C Hamano
2025-07-17 8:22 ` René Scharfe
2025-07-15 14:51 ` [PATCH 2/3] prio-queue: add prio_queue_replace() René Scharfe
2025-07-16 5:09 ` Jeff King
2025-07-16 9:38 ` René Scharfe
2025-07-17 9:20 ` René Scharfe
2025-07-19 7:02 ` Jeff King
2025-07-15 14:51 ` [PATCH 3/3] commit: use prio_queue_replace() in pop_most_recent_commit() René Scharfe
2025-07-15 20:43 ` Junio C Hamano
2025-07-16 9:38 ` René Scharfe
2025-07-16 0:07 ` [PATCH 0/3] commit: convert pop_most_recent_commit() to prio_queue Junio C Hamano
2025-07-16 5:15 ` Jeff King
2025-07-16 9:38 ` René Scharfe
2025-07-19 6:45 ` Jeff King
2025-07-16 14:49 ` Junio C Hamano [this message]
2025-07-18 9:09 ` [PATCH v2 " René Scharfe
2025-07-18 9:39 ` [PATCH v2 1/3] " René Scharfe
2025-07-21 14:02 ` Lidong Yan
2025-08-03 9:54 ` René Scharfe
2025-08-03 16:48 ` Junio C Hamano
2025-08-04 19:56 ` René Scharfe
2025-07-18 9:39 ` [PATCH v2 3/3] commit: use prio_queue_replace() in pop_most_recent_commit(),MIME-Version: 1.0 René Scharfe
2025-08-03 11:12 ` Johannes Schindelin
2025-08-03 11:33 ` René Scharfe
2025-07-18 9:39 ` [PATCH v2 2/3] prio-queue: add prio_queue_replace() René Scharfe
2025-07-19 7:04 ` [PATCH v2 0/3] commit: convert pop_most_recent_commit() to prio_queue Jeff King
2025-07-22 6:26 ` SZEDER Gábor
2025-07-22 14:27 ` Junio C Hamano
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