Unity 2D - Animation drops FPS dramatically

Question

I created a 2D sprite animation using the 2d animation package and the 2D Ik package. My character is one sprite sheet (PBS file). In the PBS file all the spites (eyes, mouth, etc, - character is basically a square with a face) are arranged and bones are attached. Then I animated the character's idle animation in Unity.

The animation is complex and is a total of 1028 frames (about 17 seconds).

The scene is almost empty otherwise. There are a few sprites with colliders and rigid bodies for simple platforms. There is a background image which is 1024 px. x 1024 px.

In play mode the FPS drops down to around 30 FPS (and under).

I have another scene without the animation but with a HUGE number of assets (for a 2D scene hundreds of sprites and many of them constantly in motion). This scene runs at 210++ FPS consistently.

Why does this one animation kill the FPS? I'm just getting started with creating animation for all the characters. If I add similar animations to NPCs in the scene (enemies) then this thing will probably not function at all.

Any suggestions are appreciated.

Answer 1

For anyone having the same issue, make sure you have Burst and Collections packages installed (via the Package manager), it extremely improves the performance of 2D Animation.