[JAVA3D] IM VS RM in Java3D[With CODE]

[Brian Youngseog Lee]

Hello everyone~
I want my one to get better performance, so I consider to use IM(immediate mode) of 
Java3D
However IM doesn't look better than RM(retained mode) of Java3D
I attached my test code
One is written in IM, and the other one is written in RM
Please read it, and tell me what I should do

HelloUniverse.java

PureImmediate.java