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Re: Implicitly opened streams and exposing stream IDs

Dmitri Tikhonov <dtikhonov@litespeedtech.com> Tue, 03 April 2018 13:56 UTC

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Date: Tue, 03 Apr 2018 09:56:45 -0400
From: Dmitri Tikhonov <dtikhonov@litespeedtech.com>
To: Nick Banks <nibanks@microsoft.com>
Cc: Martin Thomson <martin.thomson@gmail.com>, Marten Seemann <martenseemann@gmail.com>, Lucas Pardue <Lucas.Pardue@bbc.co.uk>, QUIC WG <quic@ietf.org>
Subject: Re: Implicitly opened streams and exposing stream IDs
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Mail-Followup-To: Nick Banks <nibanks@microsoft.com>, Martin Thomson <martin.thomson@gmail.com>, Marten Seemann <martenseemann@gmail.com>, Lucas Pardue <Lucas.Pardue@bbc.co.uk>, QUIC WG <quic@ietf.org>
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On Tue, Apr 03, 2018 at 01:47:36PM +0000, Nick Banks wrote:
> +1 for keeping the implicit opening of streams.
> 
> It does greatly simplify the tracking of idle/opened/closed streams.

I don't see how this is a simplification.  You will need a "set" data
structure of some sort in both cases:

    A. Implicit opening.  Opened streams can be tracked with a single
       number -- *but* closed streams need to be tracked one by one
       (using a set or a hash).

    B. Explicit opening.  Opened streams are tracked using a hash.

One can argue that (B) is actually simpler.

  - Dmitri.

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