CHICKEN User's Manual - Bugs and limitations

# Bugs and limitations

- Compiling large files takes too much time.
- If a known procedure has unused arguments, but is always called without those parameters, then the optimizer repairs the procedure in certain situations and removes the parameter from the lambda-list.
- `port-position` currently works only for input ports.
- Leaf routine optimization can theoretically result in code that thrashes, if tight loops perform excessively many mutations.

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