[jdom-interest] Toward beta 9

[Philip Nelson]

Dennis' tests account for that by skipping results for the first run only and
showing minimum and average times.

--- Vadim.Strizhevsky at morganstanley.com wrote:
> 
> Philip,
> 
> Did you discount JIT by ignoring a first few runs? I find that a first few
> (could be as high as 30 depending on the code) runs are "polluted" by JIT.
> At first the code is not JITed. then it will get JITed gradually, but
> JITing itself takes time  and adds to apparent time of the code. Also
> depending on the code JIT itself may take different amount  of time,
> which may not correlate to the actual  performance of the code. After I
> let JIT be done howerver I find the runs be quite consistent over time.
> 
> -Vadim
> 
> On Mon, 14 Apr 2003, Philip Nelson wrote:
> 
> > Not a good night 8^(
> >
> > I tried a few different approaches of using subclasses to skip
> verification.
> > As a benchmark I used Dennis Sosnoskis tests comparing to the b8, b9 rc1,
> b9
> > rc1 + Rolfs Verifier, and b9 + my SAXHandler mods.
> >
> > The best I did with any of these was to very slightly improve with the
> > SAXHandler mods on b9.  b9 slightly degraded compared to b8 (jdk1.3 on
> linux).
> >
> >
> > Some other surprises, at least to me.  Use of inner classes for node
> elements
> > was slower than classes in their own source files.  Using an anonymous
> inner
> > class though to subclass DefaultJDOMFactory in SAXHandler was somewhat
> (~15%)
> > faster than a direct class.
> >
> > I had high hopes for the Verifier and if there is some way to skip the
> > "compile" step, perhaps it would be faster.  I had my suspicions though
> when
> > the test suite for the Verifier ran slower with the Rolfs version than the
> > original did.
> >
> > So, back to the drawing board and so much for theory once again....
> > _______________________________________________
> > To control your jdom-interest membership:
> >
>
http://lists.denveronline.net/mailman/options/jdom-interest/youraddr@yourhost.com
> >
> >
> 
> _______________________________________________
> To control your jdom-interest membership:
>
http://lists.denveronline.net/mailman/options/jdom-interest/youraddr@yourhost.com