From: Gary Wright <gwtmp01@...>
Date: 2007-02-25T06:04:40+09:00
Subject: Re: threads within a thread


On Feb 24, 2007, at 1:24 PM, Logan Capaldo wrote:
> Actually, (appealling to authority here :) ) I believe Francis has
> stated in the past that the Thread overhead kills the advantage for  
> even
> IO bound tasks (in Ruby specifically) and that a select loop is  
> better.

I'd definitely defer to Francis on this but, under the hood, Ruby
uses select to multiplex IO from multiple threads so I'd be
surprised if a single Ruby thread using Kernel#select explicitly
would do better than the builtin multiplexing.

I suppose it depends what kind of IO you are talking about.  Disk
I/O is going to be faster than network IO.  I would be *really*
surprised to find that Ruby's green threads overhead is high enough
to swamp the effects of network I/O.

Gary Wright