I did a slideshow for presenting some details about my home built C64 (MaxFake64), I drew all the "slides" in petscii and saved them as binary data at the end of an assembly program, which then copies each slide into the right place in VIC memory, I think it draws the entire screen in less than one frame period.

For (that one person) who find that interesting, the slideshow can be run in the emulator at archive.org, press F1 for next slide and F3 for previous slide. https://archive.org/details/hvad_20221229