Experiment: Node properties

[Nir Lisker]

There's LazyConstants in the works for cases like these.
 (https://openjdk.org/jeps/526). Has it been looked at for this
optimization?

On Thu, Feb 12, 2026, 19:52 Marius Hanl <mariushanl at web.de> wrote:

> I also like the idea. I, once had a similar idea but not enough time to do
> a deep check. In my opinion, we should make as much lazy as possible, as
> subclasses and developers often just use a small set of properties really.
>
> What I also had a look back then is default values for properties, like
> focusTraversable. Right now, changing default values (via the setter) in
> the constructor will initialize the property, even if otherwise we never
> need it (like pickOnBounds, focusTraversable, ...). Back then, I thought
> about improving this by using a mechanism which is already there (but not
> implemented consistently and used everywhere), that is methods like
> Control.getInitialFocusTraversable(), which could work in a way without
> initializing this 100 of times (like in case of Cell).
>
> So maybe, we can save a bit more by not initializing properties by
> (essentially) changing the default value of it (therefore the getter).
> Calling the getter in most cases in JavaFX does not yet initialize the
> property itself.
>
> The biggest benefits will probably be tables, as they have rows (cells)
> with cells, that can add up quite fast with many columns. Running more
> optimized on a RaspberryPi is also good thing.
>
> -- Marius
> *Gesendet: *Mittwoch, 4. Februar 2026 um 22:17
> *Von: *"Andy Goryachev" <andy.goryachev at oracle.com>
> *An: *OpenJFX <openjfx-dev at openjdk.org>
> *Betreff: *Experiment: Node properties
> I would like to share the results of a little experiment involving
> optimization of storage of Node properties.  The basic idea is to create a
> compact fast map-like container to hold the rarely instantiated properties
> in order to reduce the application memory footprint.
>
> The savings are not overwhelming, but not exactly zero.  I would imagine
> this optimization might be more interesting in any resource constrained
> environment such as Android / iOS / RaspberryPi.  Please refer to [0] for
> the details.
>
> I encourage you to try it with your application, to see whether you notice
> any change in memory consumption and/or performance.  Let me know what you
> think!
>
> Cheers,
> -andy
>
>
> *References*
>
> [0]
> https://github.com/andy-goryachev-oracle/Test/blob/main/doc/Experiments/NodeProperties.md
>
>
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