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From: Alban Gruin <alban.gruin@gmail.com>
To: Eric Sunshine <sunshine@sunshineco.com>
Cc: Git Mailing List <git@vger.kernel.org>
Subject: Re: [RFC PATCH 3/4] name-rev: check if a commit should be named before naming it
Date: Fri, 1 Mar 2019 19:22:47 +0100	[thread overview]
Message-ID: <992c5d7e-524a-3c92-9f0f-bbefbe151de5@gmail.com> (raw)
In-Reply-To: <CAPig+cQmZOWUZuj2+z+qrrCO-YBMNiEnGic1_FwAcaaj5gA5-w@mail.gmail.com>

Hi Eric,

Le 01/03/2019 à 19:05, Eric Sunshine a écrit :
> On Fri, Mar 1, 2019 at 12:50 PM Alban Gruin <alban.gruin@gmail.com> wrote:
> -%<-
> Minor: It would probably be more efficient to check if the count is 0
> first, and only search the list if not.
> 
> By the way, how big is 'commits' likely to get? Will the linear scan
> done by commit_list_contains() become an issue? Should it be using a
> hash table instead?
> 

It depends on the amount of commits mentionned in stdin that are
reachable from the ref in name_ref().  If there is a lot of commit in
the input, it may effectively become a problem.

I thought of adding a field to the rev_name structure for this purpose.
 I think commit slabs are hash maps under the hood?

>> +                       name->tip_name = tip_name;
>> +                       free_alloc = 0;
>> +               } else {
>> +                       name->tip_name = NULL;
>> +               }

Cheers,
Alban


  reply	other threads:[~2019-03-01 18:23 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-01 17:50 [RFC PATCH 0/4] name-rev: improve memory usage Alban Gruin
2019-03-01 17:50 ` [RFC PATCH 1/4] name-rev: improve name_rev() " Alban Gruin
2019-03-01 18:00   ` Eric Sunshine
2019-03-01 18:44   ` Jeff King
2019-03-02 21:28   ` Johannes Schindelin
2019-03-01 17:50 ` [RFC PATCH 2/4] commit-list: add a function to check if a commit is in a list Alban Gruin
2019-03-01 17:50 ` [RFC PATCH 3/4] name-rev: check if a commit should be named before naming it Alban Gruin
2019-03-01 18:05   ` Eric Sunshine
2019-03-01 18:22     ` Alban Gruin [this message]
2019-03-01 18:37       ` Jeff King
2019-03-01 17:50 ` [RFC PATCH 4/4] name-rev: avoid naming from a ref if it’s not a descendant of any commit Alban Gruin
2019-03-01 18:07   ` Eric Sunshine
2019-03-03 19:33   ` Christian Couder
2019-03-03 19:46     ` Christian Couder
2019-03-03 20:27     ` Alban Gruin
2019-03-01 18:42 ` [RFC PATCH 0/4] name-rev: improve memory usage Jeff King
2019-03-01 19:14   ` Alban Gruin
2019-03-01 19:39     ` Jeff King

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