Server is slow when collecting many types for completion

Open this project in vscode, do `haxelib install all` and then open `Game.hx`, find `// TODO` place and try to write something like `addc` multiple times fast to see completion lag. `haxe.exclude` helps, but maybe something can be optimized further or push everything but types to completion first.

[stickman.zip](https://github.com/user-attachments/files/17880829/stickman.zip)

Reproduce the lag in VS Code using the attached stickman.zip: run `haxelib install all`, open `Game.hx`, and test completion at the `// TODO` location by typing `addc` repeatedly. Compare behavior with and without `haxe.exclude`; done means the reported completion lag is reduced while completion remains usable.

Written by the indexing model from the issue text.