I'm sure someone already pointed this out, but network
latency is also a
factor. AMF is a compressed format, so it can load faster and in that sense
make your app more responsive. With XML web services, the tags themselves
add a degree of overhead. There are schemes for compressing web services
which can help.
-----Original Message-----
From: [EMAIL PROTECTED]ups.com
[mailto:[EMAIL PROTECTED]ups.com]
On
Behalf Of Martin Wood
Sent: Wednesday, August 23, 2006 11:27 AM
To: [EMAIL PROTECTED]ups.com
Subject: Re: [Junk E-Mail - LOW] [flexcoders] Re: Choice of backend systems
- which provides
Jack Caldwell wrote:
> Martin:
>
> OK . . . . so the lag time is when the data gets back to the end-user?
exactly, its the time it takes for the flash player or actionscript code to
convert the incoming data into a format usable by the application.
Before in the flash world that was a big deal as XML processing was
expensive
and often tedious to code whilst remoting was natively implemented and
provided
you with typed business objects as a result of the call.
With Flex 2 the differences are not so important as the features like data
binding and e4x pretty much level the playing field for the data formats.
> Bottom line . . . . with all things being equal . . . .
>
> Does a web service request take longer to process on the server than
> a AMF request?
>
> If the answer is . . . . in general yes, then that can be an issue with an
> increase in users.
>
> If the answer is . . . . it depends on the data being requested and/or the
> data format then that seems to suggest that everyone must run tests to
> compare results and then test again based on scaling up.
I suppose one of the main factors would be the server code that handles the
incoming request and then transforms the business data into the required
format
to send back to the client.
That could be anything from some hand written php code to a commercial
remoting
gateway.
Its so context dependent that its impossible to make a general statement of
the
type 'Remoting performs better than Web Services'
It would be interesting to see a comparison of the throughput you could
expect
when comparing different solutions on the same server hardware, e.g. PHP
Nu-Soap against AMFPHP.. Jrun's remoting vs. OpenAMF vs JAX-WS etc..
and where they each perform the same business operation and return the same
data..
but then there are other concerns such as memory usage and what else the
server
is used for and how it performs for those use cases.
thats what i mean by you have to take it on a case by case basis.
:)
martin
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