Re:Performance of popular microcontroller boards running uLisp
by weinzierl on Tuesday October 22, 2024 @07:29AM
(#41913234)
If you compare it to the only other board in the table with more than 300 MHz (and the only RISC-V) you can see that Teensy outperforms it by a margin even when the results are scaled by clock speed.
Of course it would only be a complete picture taking power consumption into consideration.
Re:Performance of popular microcontroller boards running uLisp
by johnsondavies on Tuesday October 22, 2024 @08:26AM
(#41913553)
Good idea - I'll add a column to the tables giving the current consumption for each board.
Re:Performance of popular microcontroller boards running uLisp
by magicalhippo on Tuesday October 22, 2024 @09:34AM
(#41914104)
Given that it seems one can overclock[1] the RP2350 to 600MHz, it would be interesting to compare it to the Teensy at same frequency.
Re:Performance of popular microcontroller boards running uLisp
by Neywiny on Tuesday October 22, 2024 @08:35AM
(#41913602)
Also the M7 is a superscaler. It's not mentioned often, but if the task allows it, you can use what's essentially 1.5x the execution units of the smaller cores. It's not a complete 2x, but I'm sure it helps.
The M7 supports cache unlike the M0(+), and the processor used[2] has 64kB of it, split evenly into instruction and data cache. It also supports branch speculation which the M0(+) does not.
While the Teensy has 4.5x the clock frequency of the Pico 1, the Teensy is 8x faster.
Main outlier is the Pico 2 with a Cortex-M33, though still at a reduced clockspeed compared to the Teensy. From what I can see[3] it does not have cache for its on-board memory, "just" branch speculation like the M7.
[1]: https://en.wikipedia.org/wiki/ARM_Cortex-M
[2]: https://www.nxp.com/part/MIMXRT1062DVL6A
[3]: https://datasheets.raspberrypi.com/rp2350/rp2350-product-bri...