Hi.

I have had quite a bit of fun trying to get a smallish Java program to behave decently under the Classic JVM as it is very slow at first invocation (a lot of classes needing to be initialized) plus after being left alone for a while, plus - I think - if garbage collection hits while processing.

We have now essentially done what we within reason can do, and it is still not satisfactory, so we are now considering switching to the new J9 one (IBM Technology something). I did some experiments earlier and we found that the java.library.path property had changed form plus we had some issues with the native jt400 forgetting we just sent a CHGLIBL command, which is why we chose to stay on the Classic JVM, especially since our own development system is V5R3 which doesn't have the new stuff (upgrade in the horizon, not applicable right now).

Well, that decision may be reversed now. In order to avoid nasty discoveries up to a deadline I'd really like to hear others experiences of "interesting" differences or tales like "no problems at all even with jt400 foobar voodo". I am already aware that adopted authority is not supported which is ok.

I'd appreciate any help

/Thorbjørn

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