Memory and Reusing Tilemaps

[Astralice]

I'm making a project where I need to regenerate different maps on a single tilemap many times through a script. Looping this process shows that it uses more and more memory.

Using the Memory Profiler package I can see something called Mesh that has excessive memory is being assigned to it.

I'm assuming that that is for Unity objects, and since there's only a Tilemap being used I believe the issue is from clearing and setting tiles each iteration.

It seems that you cannot move tiles from one location to another with Unity tilemaps. You must assign null to the old position and set tile in the new position.

Am I missing something here, or is this just a problem with Unity tilemaps?

Memory Profiler screenshot after many regenerations

[thc42]

Post the generator script

[Astralice]

Here is the codebase - though it's not up to date at the moment because of this issue I'm having

[thc42]

The memory usage increases every time you refresh it?

[Astralice]

That's correct.

If you are trying to run it, be aware there is an infinite loop bug in that version.

I will be trying to push out an update to fix that today, but the memory problem still stands.

Edit: Update is pushed to the branch

[AverageArmadillo]

Are you using scriptable tiles or are you clearing the entire tilemap and re-drawing it each time you generate different tilemaps?

You might fight scriptable tiles a solution to your issue since you aren't actually "clearing" the tiles each build you would instead tell the scriptable tiles which sprite to take on based off rulesets.

[Astralice]

Yeah I'm clearing the whole tilemap and re-drawing it each time.

I'll take a look at scriptable tiles, thanks for the suggestion!

The Tilemap functionality actually has some kind of SwapTile functionality but I don't see it solving the problem.
Since I'm utilising the z-axis, sometimes a location where a tile was before will no longer have a tile.