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a/b · 18 October 2019, 19:26

First, small correction. I missed fillscratch, so that's 5sec for fill+copy and 7sec for code within FillPolygon2D...

How about if you test these scenarios:
- completely skip blitter code in the interrupt handler (only handle intena bits),
- only handle clear screen and similar (skip poly related blits),
- instead of actual poly blits, use size=(1<<6)+1 D=0 blits (minimal size blits, so you keep triggering interrupts).
- anything similar that comes to your mind.
So you can see how much overhead you have from pure interrupts, interrupts with minimal blits, etc. and then compare.

18 October 2019, 19:26	#58
a/b Registered User Join Date: Jun 2016 Location: europe Posts: 1,038	First, small correction. I missed fillscratch, so that's 5sec for fill+copy and 7sec for code within FillPolygon2D... How about if you test these scenarios: - completely skip blitter code in the interrupt handler (only handle intena bits), - only handle clear screen and similar (skip poly related blits), - instead of actual poly blits, use size=(1<<6)+1 D=0 blits (minimal size blits, so you keep triggering interrupts). - anything similar that comes to your mind. So you can see how much overhead you have from pure interrupts, interrupts with minimal blits, etc. and then compare.