Rainbows! Rack HTTP server user/dev discussion
 help / color / mirror / code / Atom feed
From: Eric Wong <normalperson-rMlxZR9MS24@public.gmane.org>
To: Rainbows! list <rainbows-talk-GrnCvJ7WPxnNLxjTenLetw@public.gmane.org>
Subject: Re: range requests and multipart responses
Date: Tue, 20 Jul 2010 11:54:59 -0700	[thread overview]
Message-ID: <20100720185459.GA2732@dcvr.yhbt.net> (raw)
In-Reply-To: <71E4CB4E-365A-4A6B-85EA-9C24415E1234-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

James Tucker <jftucker-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> On 20 Jul 2010, at 07:18, Eric Wong wrote:
> > [1] - For the performance-minded, it's also tough to implement multipart
> >      responses efficiently using any sendfile() implementation.
> >      Our TCP_CORK support is far from optimal under Linux right now,
> >      and not using TCP_CORK would be even less efficient with extra
> >      multipart headers.  AFAIK, sendfilev() isn't available outside of
> >      Solaris, either.
> Does cork even help in real world use cases?

Heh, good question :)

I've only seen it help in microbenchmarks and analyzing tcpdump output.
I've never bothered checking in Ruby apps (never though it'd be worth my
time, even), but I don't expect it to be worth the effort.  Maybe
somebody else will care enough...

However, I've seen corking hurt badly for things like chat apps and
anything with bidirectional small messages.  It's impossible for the
server to reliably tell what type of traffic to expect without the app
stepping in to tell it to uncork at certain points.

Eric Wong
Rainbows! mailing list - rainbows-talk-GrnCvJ7WPxnNLxjTenLetw@public.gmane.org
Do not quote signatures (like this one) or top post when replying

  parent reply	other threads:[~2010-07-20 19:12 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-07-20  6:18 range requests and multipart responses Eric Wong
     [not found] ` <20100720061803.GA8037-yBiyF41qdooeIZ0/mPfg9Q@public.gmane.org>
2010-07-20  9:21   ` James Tucker
     [not found]     ` <71E4CB4E-365A-4A6B-85EA-9C24415E1234-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2010-07-20 18:54       ` Eric Wong [this message]
  -- strict thread matches above, loose matches on Subject: below --
2010-09-03  3:26 russell muetzelfeldt

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

  List information: https://yhbt.net/rainbows/

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20100720185459.GA2732@dcvr.yhbt.net \
    --to=normalperson-rmlxzr9ms24@public.gmane.org \
    --cc=rainbows-talk-GrnCvJ7WPxnNLxjTenLetw@public.gmane.org \


* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
Code repositories for project(s) associated with this public inbox


This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).