Use lru_cache instead of inflight

[Scratch2033Alt]

Expected Behavior

NO memory leaks, GREAT PERFORMANCE. NOT USING LIKE 5GB OF MY RAM.

Actual Behavior

memory leak up to 6gb, IgorMundstein's windows memory cleaner only cleans 2gb of it, while i still experiencing LAG

Steps to Reproduce

Steps to reproduce the behavior:

1. Run the steps on the README.md
2. Run the 'npm start'
3. LOad a big project that is 10mb or larger (e.g. paper minecraft or my (wetogeter) project of the neural network thing)
4. See the task manager
5. BOOM! more than 4gb used JUST for that

System Details

Windows 10, Runned using NPM

Screenshots
Nothing :(

my notes

Yes, i know, i should have made this a pull request to fix the issue and will be fixed very fast...but i don't know how to code EVEN node.js