unity-aseprite-importer generates tons of garbage in RAM

[hippogamesunity]

Hi! I've found that your importer may generate a lot of garbage in RAM.

You can try loading the small demo image attached (256x256 px) and check Unity's Profiler. Here is a screenshot where new AseFile(stream); takes more that 1 GB RAM when loading it.

Another issues that I've found that you create temp textures and leave them in RAM. For example, here is your GetFrame(int index) method where Texture2DBlender generates new textures. I've made a workaround with destroying textures:

Demo project: https://drive.google.com/file/d/147BEdQGPhsTpYh54UNZlx5C5zPCbWrV-/view?usp=sharing