Can anybody point me on the good documentation about common principies  
and keys aspects of realisation of JIT compilers ?

   I need to have alarge array of small class'es (in c# sense struct).
  For premitive types, as the ArrayList stores value types, hence it
is possible to use apache common primitives library to save memory &
cache overflow.

We're using the Sun 1.5.0_06 JVM on RedHat (AS). The box has 4 CPUs,
they're all available and get some load (i. e. OS recognized them and
they work). But al our JVM max out by just "digesting" a single CPU, i.
e. any JVM maxes out at 25% of the system load.

I have a question : if I run two instances of Java and then calculate
the Runtime.freeMemory() then what exactly is it supposed to give me ?
1) is the free memory of the respective  class that  is running
2) free memory of both the classes in common ?

Is there any alternative to JVM exists as research product, like a 2
address or 3 address instruction set VM ? Ofcourse it won't be able to
compile class file, but can run Java program with help of a different
compiler, which will compile Java to a 2-address / 3-address

Hi Friends,
Don't missout on these articles on design techniques:
Polymorphism in Java:
http://javalive.com/modules/articles/article.php?id=19

Using the -Dsun.java2d.debugfonts=true option I've seen that java scan
for many fonts at startup.. it surely slowes down the application.. and
if it take some strange font can make the jvm crash (I have this
problem on suse 10.1 with a call to new Font("",Font.bold,9) ).

My applet works correctly for most users but some users are complaining
that on certain machines it takes about 90 seconds to loads whereas
normally it takes only about 2-3 seconds. What could be causing this
behavior? I don't have access to those machines to examine since they