Loss of performance with filters?

[jfml1974]

Today I had this concern. Mister, do you know about FPS or performance losses if filters are applied? He asked me if I played on PC, Raspberry, etc. Mister has FPS losses etc. when applying filters (scanline, etc.) My perception is that no, but I know that there are programmers on the project who will clear up my doubts. Many thanks.
(Sorry, English is not my native language.

[rhester72]

After literally years of playing...no, I've never seen any evidence of performance loss on MiSTer as a result of use of filters.

[AngelicLiver]

No there is not any perceptible performance penalty. My understanding is that MiSTer now uses the open source ASCAL scaler, you can read more about the implementation here.

I think it's important to understand that this is not comparable to the shaders used in software emulators at all and is all done in hardware via the VIP.

[softtest9]

The filters are on the ARM side. Most of the cores don't use the ARM CPU at all. Only some cores use it for implementing the CD-ROM drive, or MSU-1 in the case of SNES.

[zakk4223]

The filters are NOT on the arm side

[jfml1974]

Thank you all very much, I think it's good to know.