Testing your JavaFX applications on JDK 9

Philip Race philip.race at oracle.com
Fri Jan 27 02:37:52 UTC 2017


What VM/bitness/platforms show this ? All or just a specific one ?


On 1/26/17, 6:08 PM, Kevin Rushforth wrote:
> Hi Scott,
> Thanks for the report. The only JDK 9 specific performance problems I 
> have seen is with startup, which would be a good thing to discuss on 
> jigsaw-dev. If you are seeing actual application slowdown, that might 
> be something else, depending on where the problem is. Have you 
> profiled your application?
> -- Kevin
> Scott Palmer wrote:
>> I finally managed to get my app running on JDK 9.  It is based on a 
>> plugin architecture and the plugins are made accessible by modifying 
>> the system class loader at runtime (because that seemed to be the 
>> only way to make things like JAXB able to reach the classes in the 
>> plugins).  That “hack” broke with the module system so I had to find 
>> an alternative.  (Now I’m using a java agent to get an 
>> Instrumentation interface so I can do it in a somewhat supported way 
>> via the appendToSystemClassLoaderSearch method.)
>> Anyway, I’ve noticed that the application runs slower on Java 9.  For 
>> a simple test I see almost a 10% performance drop.  However, I’m not 
>> sure that it is Java FX related.  I see the same throughput with the 
>> default renderer or the recently added Marlin renderer, always a bit 
>> slower than Java 8u121.  I use the same JVM options, including 
>> forcing the garbage collector to use the same algorithm.
>> Is there any expectation of a performance drop with JDK 9 at this 
>> stage?  For example should I expect some unoptimized stuff in the EA 
>> builds?
>> I guess the jigsaw-dev alias the right place to bring this up?
>> I have a feeling it is going to be difficult to track down. :-(
>> I have noticed a couple layout issues fixed with JavaFX 9. Stuff that 
>> used to “snap into place” only when I resized a dialog now seems to 
>> be correct when the dialog first appears. Thanks for that!
>> Regards,
>> Scott
>>> On Jan 11, 2017, at 2:14 PM, Kevin Rushforth 
>>> <kevin.rushforth at oracle.com> wrote:
>>> As you may know JDK 9 has hit the feature extension complete 
>>> milestone [1]. We still have a small number of weeks to fix P1-P3 
>>> bugs, but we need to know about them in order to fix them. Our focus 
>>> will be on bugs that are new in JDK 9 (regressions).
>>> I ask all JavaFX developers to please download JDK 9 early access 
>>> [2] and test your application. You can report any bugs via 
>>> bugs.java.com [3]. If you have any questions about whether a 
>>> behavior is a bug or is expected, please ask on this alias or on the 
>>> jigsaw-dev alias [4].
>>> Thank you.
>>> -- Kevin
>>> [1] http://openjdk.java.net/projects/jdk9/
>>> [2] https://jdk9.java.net/download/
>>> [3] http://bugreport.java.com/
>>> [4] jigsaw-dev at openjdk.java.net

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