In general, accusing garbage collection of being culprit for sluggish
GUI performance is plain wrong. Swing GUIs can be quite snappy when
done right - but surely there are lots of not-so-right done apps out
there.

Also, the amount of GC required depends a lot on what you're doing,
and how. Typical menus, buttons and texts are quite light. But if
you're streaming a full-screen video and not re-using any buffers,
then there's definitely massive GC going on.

VisualVM (https://visualvm.dev.java.net/) is a convenient tool to
check what's going on in a particular application, performance-wise.

Best Regards,
Joonas
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