Fast Fibonacci

This is the fastest and most accurate Fibonacci number calculator I could make. It's so good it even works for negative numbers.

Warning

Python Rust laid waste to my C++.

Directions

Clone the repository.

git clone

Run the release version for best performance.

cargo run --release

Benchmarks

This can compute between the 10 (old) to 25 (new) millionth Fibonacci number in 1 second on a laptop without loss of accuracy. So it's safe to say that it's faster than @GSheaf's code.