1. which version of jdk/jfx are you using? 2. have you tried profiling your application during FXML loading? 3. have you tried looking at the heap allocation (using VisualVM or a similar tool), to see where the bulk of memory consumption is?
-andy From: Davide Perini <perini.dav...@dpsoftware.org> Date: Friday, August 25, 2023 at 16:16 To: Andy Goryachev <andy.goryac...@oracle.com>, openjfx-dev@openjdk.org <openjfx-dev@openjdk.org> Subject: Re: [External] : Re: Preload fxml to avoid slow show() I tried it, 99% of the heavy lift comes from FXML load. I have 80Kb of FXML files, nothing particularly big, I measured the laoding time on a 13900K CPU and it requires 1.8s. Once loaded, I don't know how this is possible, my apps sucks 100MB more RAM but after the first load, opening/closing the tab pane is much faster. I sincerely can't understand how a tabpane can suck 100MB od RAM and how 80Kb of FXML can require almoast 2 seconds to load on the world fastest consumer CPU (single thread). I see that there are dozens of similar threads on the internet so this should be a known problem and at this point, I think that I'm out of luck. Thank you anyway, Davide Il 25/08/2023 23:55, Andy Goryachev ha scritto: Another suggestion might be to load tabs lazily. I don't think FXML "pre-loading" is possible. -andy From: Davide Perini <perini.dav...@dpsoftware.org><mailto:perini.dav...@dpsoftware.org> Date: Friday, August 25, 2023 at 14:31 To: Andy Goryachev <andy.goryac...@oracle.com><mailto:andy.goryac...@oracle.com>, openjfx-dev@openjdk.org<mailto:openjfx-dev@openjdk.org> <openjfx-dev@openjdk.org><mailto:openjfx-dev@openjdk.org> Subject: [External] : Re: Preload fxml to avoid slow show() My tab pane is very complex with a lot of tabs, having an FXML is very welcomed. Thanks Davide Il 25/08/2023 16:45, Andy Goryachev ha scritto: You can try creating the scene graph programmatically, thus avoiding FXML entirely. -andy From: openjfx-dev <openjfx-dev-r...@openjdk.org><mailto:openjfx-dev-r...@openjdk.org> on behalf of Davide Perini <perini.dav...@dpsoftware.org><mailto:perini.dav...@dpsoftware.org> Date: Friday, August 25, 2023 at 00:45 To: openjfx-dev@openjdk.org<mailto:openjfx-dev@openjdk.org> <openjfx-dev@openjdk.org><mailto:openjfx-dev@openjdk.org> Subject: Preload fxml to avoid slow show() Hi, I have a tabpane with 15 tabs, every tab has his own controller and it's pretty crowded. On a 13900K CPU, show() method requires more than 750ms, this feels laggy... After the first show() call, loading the tab pane is much faster... Is there a way to "preload" an fxml? I tried to show() and hide() it immediately and it seems to help, but what is the best way to do it? Thanks Davide
