Slow rendering with 128x96 pixels

[ssaenger]

Great animations.

Have you tried running with a large panel before? It looks great (some only render a small circle in the middle of the screen). The problem is I average about 5fps :/. I'm using Teensy 4.1. I'm guessing this is to be expected when trying to drive 12,288 pixels.

[hpwit]

Hello
I am running them an a 128x96 using and esp32. but I am using a Special driver that allows me to refresh the panel à 128fps.
so I can have better fps. which animation are you using ? I could make a benchmark (even if the teensy is way more powerful than the esp32 at flaot calculation)

[ssaenger]

We both have the same panel size and it sounds like you are able to have a much higher fps with a less powerful chip. I wonder what I am doing wrong.
For example, the Hot_Blob() animation gives me 7 fps. It does 4 calls to render_value() and I think the slowness happens in here. Printing the statistics:
7 fps 86 kpps @12288 LEDs 137322.00 µs per frame Rendering: 99.00% Sending data: 1.00% (135301.00 + 2021.00 µs)
135ms for rendering 1 frame. That's a very long time, which equates to about 7fps.

[hpwit]

Hello
With how many pins are you driving the panel ?

[ssaenger]

I'm driving some HUB75 panels. I don't know how many pins are being used, but that is not the issue. I can drive these panels over 200fps for example. From the little statistics printed in my earlier message, the delay sending the data only accounts for about 1% of the total delay.

hpwit, how long does it take to render a frame on your end? Do you have any video showing these animations being played?
Thanks.

[twintersx]

Hello, I have the same issue running esp32-c3. @hpwit could you share your "special driver" info and setup? I am using a string of WS2811 LEDs with a single pin output from esp32. Thanks!

[hpwit]

This driver will only for esp32 and esp32s3

[twintersx]

@hpwit I've actually made the switch to ESP32 now (previously C3), can you kindly share what driver you are referring too? I'd like to avoid using the Teensy 4 for cost purposes.

[hpwit]

@twintersx I am using the https://github.com/hpwit/I2SClocklessVirtualLedDriver
let me know if you have any question.
But as the esp32 doesn"t have a fpu it will not be as fast as a teensy