FWIW, we did a lot of profiling recently of Abdera (0.3.0) w/ Yourkit.
And the low hanging fruit appeared to be allowing for streaming the
content (in our case just an XML doc) to/from the browser.
I did start to look into implementing this for Abdera, but other work
issues have intervened...
Cheers,
-- Chris
On Nov 7, 2007, at 11:11 AM, James M Snell wrote:
In continued testing, the JAF impl outperforms my version in long run
tests (average runtime of 100000 repeated operations). I'm going to
leave things as they are for now and focus on other areas, but I'm
going
to return to this and see what else I can optimize.
- James
Dan Diephouse wrote:
Argh, I'm not having very good luck today as I think I misquoted you.
You said "Currently, when first used, that class takes anywhere
between
90-300 ms to init." Why does the first init even matter? It should be
the init after the JVM has warmed up that we care about.
It might be worth getting an open source YourKit license and doing
some
profiling of the server under load with that.
- Dan
Dan Diephouse wrote:
Rereading my message, I think I might of said one thing but meant
another. What I really meant was, MimeType isn't one of those
classes
that is used across java projects. So using the JAF MimeType doesn't
really buy us much and I don't see any issue with replacing it.
BTW, 20-30 ms seems like an awfully long time... Are you running
-server -XX:ParallelGC, letting the server warm up, etc?
- Dan
James M Snell wrote:
Considering the fact that we'd still have the dependency on JAF
because
of Axiom, there likely isn't a huge difference. I'll hold on to
the new
impl class as an option (only took about 30 minutes to implement
and
test) and I'll be continuing my sweep through the rest of the
code to
find other bottle necks.
- James
Dan Diephouse wrote:
[snip]
Seeing that MimeType isn't one of those classes that is really
widely
used I don't think it matters too much.
Other ugly options: fix the MimeType in geronimo and have
people use
that jar. Or, extend MimeType and override all the methods. :-)
- Dan
S'all good --- chriswberry at gmail dot com
