Re: Death of the RPG Programmer

["Phil Hall" <hallp@xxxxxxxx>]

> IBM has claimed that optimizing at level 40 should make Java perform as
> though it were compiled.  I think that's stretching it a bit.

This is true. If you look at the reported documentation to support this, the
Java bytecode (i.e. the binary Java object code that the JVM interprets) is
converted to w-code (the intermediate ILE representation format) and then
passed to the backend program translator CUBE3. CUBE3 then creates a PowerPC
RISC instruction stream from the w-code and creates a true RISC compiled
binary program object. On executing your new optimized Java program, the JVM
under the covers does a looksee to find out if the source Java object
differs from the native RISC object, if not it runs the native object and
thus you *are* running compiled code, at compiled code speed.

Very similar to the JIT compile JVM support on Windows/Unix.

--phil

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