On Friday 15 Feb 2002 7:24 pm, David Hamilton wrote:

> Nicolai P Guba wrote :
> >> On Friday 15 Feb 2002 2:47 pm, David Ward wrote:
> >>
> >> 2) Take a look at the Reflection Performance improvements graph here:
> >> http://java.sun.com/j2se/1.4/performance.guide.html
> >> Again not sure, but this looks like it could really help JBoss
> >> performance with the Proxy layer to the EJBs.
> >
> > Probably not very much, unless deploy-time becomes of an issue.  I cannot
> > imagine any run-time features that would require relfection.  Or?
>
> Think it depends what you mean by reflection.  If you are referring to the
> process of getting Method and constructor objects the I agree, but this
> seems to refer to the actual invoke method.
>
> This article that the invoke method is 20 (twenty) times faster in 1.4 than
> 1.3.1.
>
> There must be at least two invocations on any EJB call (Proxy and
> Container), and that would, in the past, have added a much larger overhead
> than a straight method call.

Indeed, this is good news.

> Looking at the rest of the article, the claims it makes are quite
> impressive (and if realistic, would make a significant difference to JBoss
> performance, IMHO).
> They are (over 1.3.1):
> Servlets: +35%
> EJBs: +34%
> SPECjbb2000: +58%
>
> Anyone fancy trying some figures for JBoss?

I'd agree on the impressiveness ;)  We are going to stress test our servers, 
if there is any useful data, I'll publish them here.

cheers!

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