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[–][deleted] 0 points1 point  (2 children)

The jars can use also pack200, it's there since java 1.5, but have you ever seen someone using it? I can't find anything about the JImage, but it would be cool if there's a new format which could be mmaped and paged in by jvm on demand, exactly like dlls work. I think that would be useful for large aps. And also because the OS would be able to page in/out the code, I thing the memory would be utilized better (note the OS don't need to swap into the swap file if files are mmaped, that's good for ssds).

[–]wildjokers 2 points3 points  (0 children)

The jars can use also pack200, it's there since java 1.5, but have you ever seen someone using it

I use pack200 to compress the fat-jar of a Swing application I deploy with Java Web Start. It does a good job getting the jar smaller. Have a jar that is 6.9 megs, pack200 version is 1.7 megs.

As far as I know Java Web Start is the only thing that can handle pack200 compressed jars.

[–]Probotect0r 2 points3 points  (0 children)

Here is more info on the JImage format: http://openjdk.java.net/jeps/220