Improve entry preview performance

[Siedlerchr]

I'd like to provide another observation that suggests this problem not to be solved entirely: So, while reducing search triggers indeed improved editing in large databases for me, interestingly, editing entries in quite small databases can still be quite slow because of the entry rendering (the pane to the right of the entry form) being triggered at each key stroke.

My uninformed guess: It seems as if there are too many things (search, entry rendering, group admin, etc.) listening too often to too many events going on on the event bus.

I'm currently using:

JabRef 5.12--2023-11-07--2afd1f6
Linux 6.2.0-36-generic amd64 
Java 21.0.1 
JavaFX 21.0.1+6

Originally posted by @ytzemih in #8977 (comment)

[PenguinJunk]

I think I have these issues. I believe I had them in the previous version and they have persisted into:
JabRef 5.13--2024-04-01--6bdcf63
Windows 11 10.0 amd64
Java 21.0.2
JavaFX 22+30

To try to fix I have split my database so that I am working with a much smaller file. I have turned off all the searches I can identify and moved the preview to a new tab. But entry is still painfully slow and often hangs. I'm at a critical stage of my thesis and this is unhelpful, to say the least. I'm happy to explore further if you can point me where to look.

[koppor]

Short notes:

• JabRef has a mix between observables and event bus
• In my opinion, throttling is easier to implement in the event bus than in the JavaFX observables
• I am more a fan of the event bus, because it establishes loose coupling (more reading: https://www.enterpriseintegrationpatterns.com/patterns/messaging/)

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I think, one can try to move the entry preview to a separate tab