Using AsyncComputeTaskPool to create a large map without Halting game.

[miketwenty1]

I'm for some reason unable to replicate the performance of a single TilemapBundle vs chunking attempts. Whenever I chunk in many TilemapBundles to create an overall larger landscape, the game is not nearly as performant as a single 1 shot TilemapBundle using a single tile_storage.

The problem I'm having is a single large TilemapBundle, which has 1,000,000 tiles, can take many seconds to create. I would like to give the user a simple interface while they wait for the map to load without halting the entire game for many seconds on the spawn/creation frame.

I was thinking AsyncComputeTaskPool would be a solution, but I'm a little confused on how to get it to work:
My idea was to pass a single TileStorage as a Resource, then have a handler set the position of the incoming entity TileBundle. After completing the TileStorage value, I would then finally create the TilemapBundle. I however can't get a working PoC.

Here is my current attempt, currently resulting in:

panicked at /..../.cargo/registry/src/index.crates.io-6f17d22bba15001f/bevy_ecs_tilemap-0.15.0/src/render/extract.rs:274:52:
called `Result::unwrap()` on an `Err` value: QueryDoesNotMatch(9v1 with components )

https://github.com/miketwenty1/wonder15/tree/async-attempt
Any help would be appreciated!