Re: [quicwg/base-drafts] Incorrect values for Required Insert Count (#3305)

Dmitri Tikhonov <> Tue, 17 December 2019 13:14 UTC

Return-Path: <>
Received: from localhost (localhost []) by (Postfix) with ESMTP id E71C712026E for <>; Tue, 17 Dec 2019 05:14:31 -0800 (PST)
X-Virus-Scanned: amavisd-new at
X-Spam-Flag: NO
X-Spam-Score: -6.595
X-Spam-Status: No, score=-6.595 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_IMAGE_ONLY_28=1.404, HTML_MESSAGE=0.001, MAILING_LIST_MULTI=-1, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: (amavisd-new); dkim=pass (1024-bit key)
Received: from ([]) by localhost ( []) (amavisd-new, port 10024) with ESMTP id Swrfq2CRHptV for <>; Tue, 17 Dec 2019 05:14:30 -0800 (PST)
Received: from ( []) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by (Postfix) with ESMTPS id 5070312022D for <>; Tue, 17 Dec 2019 05:14:30 -0800 (PST)
Date: Tue, 17 Dec 2019 05:14:29 -0800
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;; s=pf2014; t=1576588469; bh=RClhmToTrqyU1AoU4N6CVJMsa9kvboFixDK3OPLAkm0=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:List-ID: List-Archive:List-Post:List-Unsubscribe:From; b=TscUQH/sBa6AsI7nFz0VkA+YyUvT7U5ZtvefZKOIY2dtmBbCeO/0gjB6A1n9hO32N ivCtcik7TTmOjixLFd1Cmb1ClwTr0t0VGAuSFGBb54d8Jhhy2laMiOsqub5BGgIIlT jbfyWT1c6wMWQTVBVkVP+g3eqg255dAeOUDV5mCE=
From: Dmitri Tikhonov <>
Reply-To: quicwg/base-drafts <>
To: quicwg/base-drafts <>
Cc: Subscribed <>
Message-ID: <quicwg/base-drafts/issues/3305/>
In-Reply-To: <quicwg/base-drafts/issues/>
References: <quicwg/base-drafts/issues/>
Subject: Re: [quicwg/base-drafts] Incorrect values for Required Insert Count (#3305)
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="--==_mimepart_5df8d4b5836c1_28213fe9014cd964115768"; charset="UTF-8"
Content-Transfer-Encoding: 7bit
Precedence: list
X-GitHub-Sender: dtikhonov
X-GitHub-Recipient: quic-issues
X-GitHub-Reason: subscribed
X-Auto-Response-Suppress: All
Archived-At: <>
X-Mailman-Version: 2.1.29
List-Id: Notification list for GitHub issues related to the QUIC WG <>
List-Unsubscribe: <>, <>
List-Archive: <>
List-Post: <>
List-Help: <>
List-Subscribe: <>, <>
X-List-Received-Date: Tue, 17 Dec 2019 13:14:32 -0000

>  This is a performance problem up until the point where the encoder hasn't provided the "required" entries and **finds no reason to do so**, at which point the performance bug could be come a deadlock. [Emphasis added.]

The "finds no reason to do so" is a functional, not performance, bug in the encoder.

As for performance, that's why there is the `QPACK_BLOCKED_STREAMS` setting.

> I think that it would be better for the protocol if a decoder were able to generate an error if the maximum index referred to in a header block did not exactly match the Required Insert Count.

I thought there was verbiage to that effect already, but I don't see it in the [current draft](

You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub: