Limit work done per frame

[maxammann]

Even thought his can be done by newcomers, this issue is HARD

We need to do some work on the main thread:

• Receive data from threads or WebWorkers
• upload data to GPU

Here for example we process all the data we receive in the event loop:

https://github.com/maxammann/maplibre-rs/blob/2b917e9e0850d95c876bfcf0f0f3c777f56b842d/maplibre/src/stages/populate_tile_store_stage.rs#L41-L43

We could limit this to a certain amount of messages or the message sizes.

🤔 Expected Behavior

No frames should be dropped.

😯 Current Behavior

Sometimes frames are dropped because of uploads.

💁 Possible Solution

Limit the time spend on uploading or other work. This can either be done by measuring time (low level), or by restricting it on a higher level, e.g. the amount of work items.

Steps for this issue:

1. Check where the most time is spent during the render loop using the Tracy profiler
2. Reduce it by doing less work per frame.