performance evaluation

[luca]

Hallo, I am developing a JSP tag-library. I would like to have a framework
to measure how performance varies as I take different implementation
decisions (such as syncronized vs unsyncronhized HashMaps and the like).

My problem is that I have no idea where to start.

Can anyone point me in the right direction wrt
reading and software to actually set up such a framework?

Also, over time, I heard people mention that the way Java manages Strings
can be the source of bottlenecks in the system. Any reading I can do
about that specific problem?

thank you

Luca

 

[Christophe Vanfleteren]

luca wrote:

Also, over time, I heard people mention that the way Java manages Strings
can be the source of bottlenecks in the system. Any reading I can do
about that specific problem?

http://java.sun.com/developer/JDCTechTips/2002/tt0305.html

I googled for the magic keywords "Java String performance". You could have
too.

 

[Christophe Vanfleteren]

Hallo, I am developing a JSP tag-library. I would like to have a framework
to measure how performance varies as I take different implementation
decisions (such as syncronized vs unsyncronhized HashMaps and the like).

My problem is that I have no idea where to start.

Can anyone point me in the right direction wrt
reading and software to actually set up such a framework?

Jmeter might help:

http://jakarta.apache.org/jmeter/index.html

 

[Roedy Green]

My problem is that I have no idea where to start.

see http://mindprod.com/jgloss/profiler.html

You may have some trouble finding a tool to work in that womb
environment.

 

[luca]

I googled for the magic keywords "Java String performance". You could have
too.

498,000 hits. I was hoping that someone here could be more specific

luca

 

[Andrew Thompson]

...
498,000 hits. I was hoping that someone here could be more specific

More specifically, what did
you discover from the top 10?

 

[Christophe Vanfleteren]

498,000 hits. I was hoping that someone here could be more specific

luca

It is a generally expected that a search engine returns the most relevant
pages first. So I suggest you look at some of them.

Learning how to use a search engine will get you further than having to ask
a newsgroup everytime. Especially on wide known/debated issues like the
performance of String concatenation in Java.