"Pi Pico 2" - Pre-Development projects discussion

[JasonACT]

On 10/23/2024 at 12:33 AM, visrealm said:

Pretty interesting results - especially with #2. It looks like the RP2350 is quicker even running identical machine code. These tests don't really compare what the compiler can do with an RP2350 vs the RP2040, since this is mostly GPU-bound which is written in assembly. The render speed tests will measure that (coming soon).

I have a strange feeling.. the speed difference is due to interrupt processing (taking less time in the generated C code, therefore giving more cycles to the GPU).  A test for later maybe, I'm fighting the GCC RP2040 generated code (which basically ignores most code changes I make to improve speed, even though I can see where it's wasted time).  Moving code around does nothing, GCC decides where everything should sit, locals included.  hMmf.

[visrealm]

I agree. That makes sense. GCC has taken advantage of the better Arm core where it can, leaving more time for the GPU.