JRebel initially very slow

From: Marc Guenther (yod..chli.ch)
Date: Sat Aug 28 2010 - 13:06:19 UTC

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    Hi,

    Is anyone else using JRebel successfully? I am currently playing around with it, and I notice that it makes app startup and usage very slow.

    App startup changed from 9sec to 63sec. I think I _could_ live with that, but every click is now also very slow, at least for new pages. What usually takes 2secs (for a slow page) now easily takes 20s.

    This only happens on new pages, though, clicks to pages that have been used already are as fast as ever (so once I am where I need to be in my app, its fast, and it works quite nicely).

    So I suspect it is something to do with the classloader, and jrebel instrumenting all new classes, or whatever it does. I checked with -Drebel.log=true that it is only instrumenting our own classes, and not the whole of Webobjects. The output of -Drebel.log.perf=true doesn't really tell me anything.

    I'm using the most recent jrebel 3.1.2a. I'm on MacOSX 10.6, Java 1.5, Eclipse 3.6 and WOLips 3.6.6116, using WO 5.4.3 (no Wonder)

    Is this a problem with my setup, or is it so slow for everybody?

    Thanks,
    Marc

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