Jar file compression - to do or not to do

2 quick questions for the jar gurus out there...
I have several jar files:
1. a jar file for my app itself
2. a common jar (shared generic libraries for all my apps)
3. a common db jar (shared db libraries for all my apps + mysql drivers)
4. a misc jar (stuff like java help and GUI calendar classes)
The way I see it, I have several choices:
1. leave the jars seperate and leave uncompressed
2. leave the jars seperate and compress them
3. combine them all into one jar and compress the entire archive
4. combine them all into one jar and leave them uncompressed
I realize that smaller jar size is good if users are downloading the jar but this application is run from the local drive, not from the web, so fast download times are not important to me.
My questions are:
1. Is there any benifit to compressing a jar other than fast download times? (I assume the answer is no).
2. Is there any benifit to combining the jars?
I'm thinking that having a combined jar might make installations easier, but future upgrades might be easier with multiple jars (if just the common jar changes for instance...)
In particular, I am wondering about application startup time and total memory usage, is there a difference in these areas from how the jar is packaged?
I look forward to any feedback you all can provide.
Cheers,
Andy Dingfelder

When everything is running well is the time to update.
Updating when your Mac is having problems is a recipe for disaster and then you arrive at this worldwide online hospital for sick Macs
Back up > Remove iPods, spare HDs and assorted peripherals > Download Combo updater from Apple > Restart > Then install and be patient through two Automatic restarts.
No problems here.

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