From: Robert Mela <rmela@...>
Date: 2006-07-03T04:57:53+09:00
Subject: Ruby and Rails performance profiling?

--------------030306040606030703030400
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

What tools exist for profiling Ruby?  

What might answer a lot of these questions is something along the lines 
of a call tree showing time spent ( clock/sys/user) or CPU cycles for 
each node of the tree (node and node+children).

Other questions:

Does a Rails development do more checking and recompiling than a rails 
production environment?  If so, by how much does that affect results?

Is your CGI loading and initializing the Ruby interpreter each time its 
invoked?


Francis Cianfrocca wrote:
>
>
> We recently did a simple hello world test with Rails on a very low-end
> machine and compared it with a Ruby framework that we built for our
> commercial apps. Both apps had no database, and simply served the phrase
> "Hello, world" with a text/plain mime type. The test client was running
> localhost to minimize TCP and network effects. Rails was running in 
> fast-cgi
> mode (one process for the whole run) and our framework was running in CGI
> mode (one fork per request).
>
> Rails did 20 pages per second. The other app did 200 per second.
> (Straight-run apache with a cached static page of similar size could
> probably do 1000/second or more on this machine.)
>
> Bear in mind, both of these frameworks are *Ruby*. This tells me the
> comparison to other languages is misleading at best.
>


--------------030306040606030703030400
Content-Type: text/x-vcard; charset=utf-8;
 name="rmela.vcf"
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment;
 filename="rmela.vcf"

begin:vcard
fn:Robert Mela
n:Mela;Robert
adr;dom:;;;Lexington;MA
email;internet:rmela@rcn.com
tel;cell:781-363-0982
x-mozilla-html:FALSE
version:2.1
end:vcard


--------------030306040606030703030400--