From: Ryan Pavlik <rpav@...>
Date: 2003-04-04T06:06:15+09:00
Subject: Clarification: read/write slow, and TCPSocket and sys{read,write}

On Fri, 4 Apr 2003 05:48:53 +0900
Ryan Pavlik <rpav@nwlink.com> wrote:

<snip>
> For instance, I can marshal and send 1000 objects, and receive 1000
> replies, in a fraction of a second.  However, if I send them one-by-one,
> it takes minutes!   Same code on both ends for the test.  What gets sent
> is a 4-byte network-order length, followed by the data.
<snip>

I hate replying to myself, but I should clarify.  They are always sent
and handled one-by-one.  Send an object, the server handles and object,
and sends the reply.

The slow part is when I send the object, get the reply, send the object,
get the reply, etc.  If I send 1000 objects in a row and then read the
1000 replies, it's fast.  But they're always sent and handled
individually.  A little pseudocode to help:

Fast:

(1..1000).each {
   connection.send(Ping.new)
}

(1..1000).each {
   pong = connection.get
}


Slow:

(1..1000).each {
    connection.send(Ping.new)
    pong = connection.get
}

I hope that's clearer. :-)

-- 
Ryan Pavlik <rpav@users.sf.net>

"I've got a crude stabbing implement right here with
 your name all over it." - 8BT