Nathan Meyers <[EMAIL PROTECTED]> wrote:
> I don't mean to be heretical, but using an unoptimized sample
> implementation is not always the best solution for mission-critical
> server applications.
Sure. But,
> The Blackdown ports, and the more recent IBM and
> Inprise ports, are a huge boon to Java developers and users on Linux -
> but they're sample implementations that have ported a lot of inefficient
> code directly from Sun.
IBM has been modifying large part of Sun's classic
VM. Especially in memory system. It's not only a ported
version.
For example, handle is removed. To be exact, With
classic VM, double memory references is needed to reach
object data from a handle, but IBM's mixed mode
interpreter (MMI), Sun's HotSpot VM and ResearchVM
require only single reference.
The source code for IBM JDK is not released publicly
yet, but we can see some part of it in some header files
located at JDK_HOME/include/, oobj.h and interpreter.h.
Kazuyuki SHUDO Happy Hacking!
Muraoka Lab., Grad. School of Sci. & Eng., Waseda Univ.
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