Question Tilemap and loading scenes

Hi everyone,
I'm creating my first 2D game and at the point of splitting it up into scenes to improve future performance. I'm having a background scene that contains my "don't destroy on load" assets, and I'm additively loading every other scene on top of that. I was wondering what would be best:
- keeping a single tilemap on the background scene? (this would make layers/referencing easier)
- having a separate tilemap on each scene I load? (may be better in terms of performance?)

I have no clue on whether it will make much of a difference to performance so was hoping to find out what would be best practice. Thanks,

Elena

 

if you have 1 tilemap in both cases its the same

 

So you're doing speculative optimization??? That rarely turns out well.

Yep, that's speculative optimization! Prepare to wreck your project.

DO NOT OPTIMIZE "JUST BECAUSE..." If you don't have a problem, DO NOT OPTIMIZE!

If you DO have a problem, there is only ONE way to find out. Always start by using the profiler:

Window -> Analysis -> Profiler

Failure to use the profiler first means you're just guessing, making a mess of your code for no good reason.

Not only that but performance on platform A will likely be completely different than platform B. Test on the platform(s) that you care about, and test to the extent that it is worth your effort, and no more.

https://forum.unity.com/threads/is-...ng-square-roots-in-2021.1111063/#post-7148770

Remember that optimized code is ALWAYS harder to work with and more brittle, making subsequent feature development difficult or impossible, or incurring massive technical debt on future development.

Notes on optimizing UnityEngine.UI setups:

https://forum.unity.com/threads/how...form-data-into-an-array.1134520/#post-7289413

At a minimum you want to clearly understand what performance issues you are having:

- running too slowly?
- loading too slowly?
- using too much runtime memory?
- final bundle too large?
- too much network traffic?
- something else?

If you are unable to engage the profiler, then your next solution is gross guessing changes, such as "reimport all textures as 32x32 tiny textures" or "replace some complex 3D objects with cubes/capsules" to try and figure out what is bogging you down.

Each experiment you do may give you intel about what is causing the performance issue that you identified. More importantly let you eliminate candidates for optimization. For instance if you swap out your biggest textures with 32x32 stamps and you STILL have a problem, you may be able to eliminate textures as an issue and move onto something else.

This sort of speculative optimization assumes you're properly using source control so it takes one click to revert to the way your project was before if there is no improvement, while carefully making notes about what you have tried and more importantly what results it has had.

 

Thanks Kurt, I had not even come across the term speculative optimisation, but will read up on your links. I don't have a problem atm, but posts online said multiple scenes were the way to go, hence the question. Will revert back to simplifying the project (it's only me, and I have source control so no biggie).

 

Multiple scenes are a great idea, especially for organizing and avoiding duplication.

Rarely will slicing scenes different ways result in speed increases. Perhaps, but the effect would likely be both incidental and trivial.

Additive scene loading is one possible solution:

https://forum.unity.com/threads/right-way-for-performance-divide-scene.1023673/#post-6630961
https://forum.unity.com/threads/right-way-for-performance-divide-scene.1023673/#post-6754330

https://forum.unity.com/threads/problem-with-canvas-ui-prefabs.1039075/#post-6726169

A multi-scene loader thingy:

https://pastebin.com/Vecczt5Q

My typical Scene Loader:

https://gist.github.com/kurtdekker/862da3bc22ee13aff61a7606ece6fdd3

Other notes on additive scene loading:

https://forum.unity.com/threads/removing-duplicates-on-load-scene.956568/#post-6233406

Timing of scene loading:

https://forum.unity.com/threads/fun...ject-in-the-second-scene.993141/#post-6449718

Also, if something exists only in one scene, DO NOT MAKE A PREFAB out of it. It's a waste of time and needlessly splits your work between two files, the prefab and the scene, leading to many possible errors and edge cases.

Two similar examples of checking if everything is ready to go:

https://forum.unity.com/threads/daily-events-and-content-changes.1108202/#post-7143713

https://forum.unity.com/threads/uni...on-before-other-scripts.1153739/#post-7401794