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Re: [Extra] I-D Action: draft-ietf-extra-imap-uidonly-02.txt

Alexey Melnikov <alexey.melnikov@isode.com> Thu, 31 August 2023 12:45 UTC

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Date: Thu, 31 Aug 2023 13:45:14 +0100
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To: Arnt Gulbrandsen <arnt@gulbrandsen.priv.no>
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From: Alexey Melnikov <alexey.melnikov@isode.com>
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Subject: Re: [Extra] I-D Action: draft-ietf-extra-imap-uidonly-02.txt
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Hi Arnt,

Thank you for your comments.

On 31/08/2023 11:13, Arnt Gulbrandsen wrote:
> Hi,
>
> LGTM, so I suggest removing the following:
>
>   IMPLEMENTATION NOTE: this document is not yet at the state where it
>   is implementable.  Please contact document authors if you want to
>   experiment with implementing UIDONLY.
Good point.
> I see no reason to add any security considerations.
Ok.
> You might want to drop the RECENT and EXISTS responses to SELECT. I 
> don't care either way.
I think RECENT and EXISTS should stay. IMAP4rev2 dropped RECENT anyway, 
but knowing number of messages in a mailbox is still
>
> You might want to add an appendix: "Motivation. Processing SELECT can 
> take a long time on big mailboxes, making clients less responsive. In 
> an experiment, UIDONLY reduced the processing time for SELECTing a 
> 100,000-message mailbox from x to y seconds." Of course that requires 
> testing. Ouch.
This is hard to estimate and would be very implementation dependent.
>
> After that, LC and go!
>
> Arnt

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