ControlNet Stack input increases KSampler Advanced Efficient image generation time proportionally to the number of active controlnets

[alessandroperilli]

In the scenario below, I enabled a CR Multi-ControlNet Stack node with 3 controlnets (Canny, Depth, and OpenPose). The stack conditions a KSampler Advanced Efficient node.

Doing so enormously increases the generation time: all things equal, the SDXL base model goes from ~3min30s / image (I'm on a Mac...) to ~8min50s / image.

If I modify the stack to only use 2 controlnets, the generation time goes down to ~6min36s / image.

With 1 controlnet only, the generation time goes down to ~4min51s / image.

Is this behavior normal? I don't recall ControlNet influencing generation time in A1111 or SD Next, even when I used 3 at a time, like in this case.

(I noticed this a while ago. It's not something new. I just didn't report it before because I wasn't certain it's an anomaly)

[halr9000]

I would try and see how long it takes when you try to reproduce the workflow as closely as possible using auto1111 for reference. If I didn't have a diff issue w/efficiency nodes now, I would try to run your workflow on my hardware for comparison.

[alessandroperilli]

Thanks for the help. My workflow is here if you want to give it a go: https://perilli.com/ai/comfyui

[KINGLIFER]

Thanks for the help. My workflow is here if you want to give it a go: https://perilli.com/ai/comfyui

Is there a way to reach you? I have tried and there was no response. Trying to see if you could assist on a project. I have no issue sending a tribute or patron donation.

[alessandroperilli]

@KINGLIFER Sorry about that. Did you try to send me an email at the address on this page?

Click on Ask for a Quote and you should be good to go. I checked the email address and it works as expected.