XY very slow display of directories with images

[admin]

That cache won't happen. XY does the work you tell it to do (heavy columns...), and Windows as well does the work you tell it to do (Defender...). Work takes time. Buy faster hardware.

[Horst]

Why don't you make an exception for the XY processes and its dir ?

I am aware of this possibility. But for me it makes sense that Defender is checking the file before XY touches it.
I believe it is a security risk to exclude XY from Defender because it can run all kind of tasks on a file including opening it.

A wrong assumption.
Defender has checked a file after its was stored onto the disk by its real time component
and there is no need to check it again when opened by a file manager.

[Julian]

Defender has checked a file after its was stored onto the disk by its real time component
and there is no need to check it again when opened by a file manager.

It still does - and this also makes sense because of updates to the Anti Virus Database which come in at least every single day.

I understand that a cache is just a work around - the ideal and sensitive solution would be a separate task and asynchron updates to the displayed information. That would improve the XY experience at various places a lot and is a widely used method now.
"Buy faster hardware" does not solve the problem at all - since the hardware is not really the bottelneck. The AntiVir task only takes about 20% of my CPU performace and XY is waiting for it with 0.3% - and lock up.