Custom transform slow down the frame rate

[Rémi Deletrain]

Hi everyone,

I make a custom transform in python.

In  my scene I have 111 of it. Before that my scene turn to 50Fps and now she turn to 16 Fps.

I take the api documentation file for create my custom transform.

This loss of frame rate is from python code ?

For use parallel evaluation I need to add code ?

[Marcus Ottosson]

Yep, sounds about right.

For things to run faster, you can either do no drawing, do less complex drawing, have less nodes to draw or implement it using C++. I've banged my head on this a few times as well, and I wish there was a better answer. :(

With regards to parallel evaluation; that doesn't apply here because (1) drawing always happens in the main thread and (2) Python nodes cannot be parallelised. In fact, if you include a Python DG node somewhere in a dependency graph, Maya will kindly go ahead and disable parallel evaluation for that branch.

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[Rémi Deletrain]

Thank you for your reply Marcus,

I converted my nodes into cpp and I found the same frame rate as with classic transform.

I do not thinked about the fact that parallelism was not possible in python ...

Thank you very much