From: "NAKAMURA, Hiroshi" <nahi@...>
Date: 2003-03-08T00:20:13+09:00
Subject: Re: SOAP, DRb and direct method call (was Re: XmlConfigFile usage)

Hi,

> From: "Brian Candler" <B.Candler@pobox.com>
> Sent: Friday, March 07, 2003 10:58 PM

> On Fri, Mar 07, 2003 at 10:05:22PM +0900, NAKAMURA, Hiroshi wrote:
> > > In fact, using dRuby instead of SOAP, it takes only 0.3 seconds to do ten
> > > complete RPC exchanges, including the actual server work of a DBI query and
> > > building the return object tree each time!
> > > 
> > > I can hardly ignore a performance factor of 250 times...
> > 
> > 250 times!  Definitely rpc via soap is slower than drb,
> > but 250 times is too much.  I think there should be another
> > bottleneck, TCP socket creation, loading WSDL everytime for example.
> 
> I've done some more tests too, and SOAP still seems to be the major
> bottleneck. Maybe it's to do with the way I'm using it?

I misunderstood you.  You said
  ruby's marshal : soap marshal = 1 : 250
I thought
  druby's call : soap's call = 1 : 250
The last testsuite of mine is for the latter.

Ruby's marshal is 300 times faster than soap?  Should be.
The larger object, soap's marshal may get more slowner.

> So I stand by my original "250 times faster", allowing for some experimental
> error :-)

You are correct.

And more:
  Marshal: binary string/stream <-> Ruby's object
  SOAP4R:  XML string/stream <-> SOAP Data Model <-> Ruby's object

So SOAP4R will never be as fast as Marshal, even if I'll rewrite it in C.


> What I've done is taken my app and cut it down to the bare minimum. It's
> attached to this mail as a tgz because I've used a long constant string to
> import the result object (lazy!). The server returns this object in response
> to an RPC request, and the client makes 100 such requests.

Thanks.  I wrote a server with webrick, which supports HTTP/1.1
persistent connection to reduce TCP sockets.

$ ruby18 drbclient.rb
  0.110000   0.140000   0.250000 (  0.752000)
$ ruby18 soapclient-xmlscan.rb
 14.130000   0.822000  14.952000 ( 25.227000)
$ ruby18 soapclient-rexml.rb (with soapserver-rexml.rb)
 12.018000   0.821000  12.839000 ( 23.880000)

30 times slower.  Hmm.  I should get profile.

Regards,
// NaHi