[news.eclipse.platform] Perfermance between diffrent version of JRE and

["Shawn Chen" <java.freshman.cx@xxxxxxxxx>]

Hi, all

Today, I encountered a strange problem: running the same java code with
different version of JRE (Java Runtime Environment), 1.4 and 1.5, or on
different version of Eclipse platform, 3.0 and 3.1, results in extremely
different footprint.



As we known, generation of Java byte code depends on compiler, an important
component of JRE. Different version of JVM (Java Virtual Machine), another
important of JRE, will also affect the run result directly. But what makes
me confused in deed is that JRE with higher version results in more
footprints. However, it looks that performance goes worse with the increase
of JRE version.

If I can reluctantly accept the truth that performance does something with
JRE, it sounds somewhat unreasonable that it¡¯s related with running
platform. My project is an eclipse plug-in and I try to run it on both
eclipse 3.0 and 3.1. The footprint increases sharply and abnormally on
eclipse 3.1, eliminating the affection of code itself. Though the plug-in
project is running on eclipse platform, the life cycle including compiling,
linkage and run is independent from the platform. So I am very confused with
the phenomena.

If someone getting acknowledge of anything about it, please kindly give me
some instructions. Thanks very much!!