You can use https://github.com/igrigorik/em-http-request  

With EM::Iterator you can also specify how many concurrent requests you want to 
do

Dave Newman  
@whatupdave


On Friday, 2 December 2011 at 5:53 PM, Dmytrii Nagirniak wrote:

>  
> On 02/12/2011, at 4:38 PM, [email protected] (mailto:[email protected]) 
> wrote:
> > When you're handling I/O and not doing any CPU intensive operations, you 
> > don't need to use defer.  
>  
> That sounds like my case. Doing HTTP requests and just waiting for the 
> response.
> If you don't use defer for that, what else?
>  
>  
> > On 2 December 2011 16:26, Dave Newman <[email protected] 
> > (mailto:[email protected])> wrote:
> > > I think by default it keeps 10 threads around for running async 
> > > operations.
> > >  
> > > Dave Newman  
> > > @whatupdave
> > >  
> > >  
> > > On Friday, 2 December 2011 at 4:09 PM, Dmytrii Nagirniak wrote:
> > >  
> > > > On 02/12/2011, at 3:47 PM, [email protected] 
> > > > (mailto:[email protected]) wrote:
> > > >  
> > > > >  
> > > > > Hi Dmytrii,
> > > > >  
> > > > > On 2 December 2011 15:37, Dmytrii Nagirniak <[email protected] 
> > > > > (mailto:[email protected])> wrote:
> > > > > >  
> > > > > > On 02/12/2011, at 3:16 PM, Dave Newman wrote:
> > > > > >  
> > > > > > > You could use eventmachine.
> > > > > > >
> > > > > >  
> > > > > > EM uses Threads under the hood. So it's doesn't seem to be cheap.
> > > > >  
> > > > > No - it works like node.js.  It uses event-driven I/O based on epoll, 
> > > > > which is similar to libev (what node.js uses). It's fast (for Ruby) 
> > > > > and cheap.  Anything you can do in node.js you can do with 
> > > > > EventMachine, libraries permitting.  
> > > > Hmm. Interesting. The docs say that it does use threads internally:  
> > > >  
> > > > The action of defer 
> > > > (http://eventmachine.rubyforge.org/EventMachine.html#M000486) is to 
> > > > take the block specified in the first parameter (the “operation”) and 
> > > > schedule it for asynchronous execution on an internal thread pool 
> > > > maintained by EventMachine 
> > > > (http://eventmachine.rubyforge.org/EventMachine.html).   
> > > >  
> > > > But I guess it should indeed be cheap enough with the internal thread 
> > > > pool.
> > > >  
> > > > Thanks.
> > > >  
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