A proper way to target 12FPS (or less) on fanless GPUless industrial PC

Hello Everyone!
First let me express my sincere thanks to all Babylon.js team and community.
I’m using babylon.js since two years, and i always manage to find the answers to my questions after quick check of the code and the API doc, or after quick tests on the great PG.
It’s my first question to the community, and maybe it’s already answered lot of times, but not for the same purpose or use-case as mine.
There are lot of topics on getting the max possibles FPS from the hardware, or optimize scene and nodes to get smooth experience with 60 FPS (or more), but my aim is different.
Here is my use case :

  • It’s an industrial monitoring tool, with some (almost) real-time constraints, on which the babylon.js scene is not the main task, the other monitoring tasks have the most important priority (charting and scientific calculations, on top of real-time data reception).
  • The dynamic of the scene is not too high, the quickest animation need to be refreshed 10 times per second based on real-time industrial data bus data reception interval.
  • The industrial PC is a fanless GPUless PC (lot of dust arround), the PC work 24h a day, and shouldn’t get hot, nor be rebooted.
  • the reason why i’m trying keep babylon.js at 12FPS (more then enouph for my application) to keep CPU time available for other tasks.

But i still can not find a proper way to do it, even tried to modify babylon.js engine code, but FPS always get back to 60 if CPU is available.
I tried timeout on render loop, conditional rendering,… but nothing worked
Your ideas are welcome
LedDev

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You might find better results tapping directly into the RAF loop; it sounds like you want to control the timing of each individual system. Just handle the timing loop yourself and integrate a delta time for BJS rendering.

You can try something like this:

https://playground.babylonjs.com/#VPQHSP

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