Dynamically changing debugFreezeFrame can cause issues on large tilesets

[BlockCnFuture]

What happened?

I wrote a sandcastle to illustrate the logic of what I'm doing, but I don't have access to a large model so this sandcastle may not reproduce the problem, it's just to illustrate what I'm doing

Reproduction steps

Since large models will reload distant tiles when the camera moves, this will cause serious FPS drops and cause the model to move lags, so I enable frame froze when the mouse is pressed and disable frame froze when the mouse is released. However, this error appeared when I moved the model repeatedly many times.

Sandcastle example

https://sandcastle.cesium.com/#c=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

Environment

Browser: electron 25.2.0
CesiumJS Version: 1.120
Operating System: win11

[ggetz]

Hi @BlockCnFuture, thanks for the report!

This property is for debugging only; it is not optimized for production use.

Strictly speaking, yes, this is a bug. But since it appears to be a corner case of a debugging feature, we are unlikely to provide a fix ourselves so I'm going to close the issue.

However, if you are interested in contributing a fix, we would be happy to review a PR!