But it doesn't need to push every frame every second, the whole screen not always changes
> Another core wont help much because it shares the memory bus, and fill rate is the bottleneck here.
Depends on CPU, some (RP2040 for example) have segmented memory which means you can just have one core working on the graphics, and dedicate segment to DMA
Slint already supports rendering just the dirty regions of the screen. SPI is a major performance handicap though — they could use PIO on the RP2040 to implement an 8 or 16 bit parallel bus (and then they’d need a display with support for parallel IO), and that would help a ton.
Here’s Slint running on my own backend for the Teensy MicroMod (has an NXP i.MX RT1062 processor) using DMA and an 8-bit parallel bus using FlexIO:
> Another core wont help much because it shares the memory bus, and fill rate is the bottleneck here.
Depends on CPU, some (RP2040 for example) have segmented memory which means you can just have one core working on the graphics, and dedicate segment to DMA