Besides constant folding, there might be [code alignment](https://dendibakh.github.io/blog/2018/01/18/Code_alignment_issues) that can cause massive perf difference.
- the Fibonacci benchmark adrianv
- Re: the Fibonacci benchmark Hlaaftana
- Re: the Fibonacci benchmark DTxplorer
- Re: the Fibonacci benchmark miran
- Re: the Fibonacci benchmark cblake
- Re: the Fibonacci benchmark dom96
- Re: the Fibonacci benchmark zahary
- Re: the Fibonacci benchmark cblake
- Re: the Fibonacci benchmark Hlaaftana
- Re: the Fibonacci benchmark cblake
- Re: the Fibonacci benchmark mratsim
- Re: the Fibonacci benchmark cblake
- Re: the Fibonacci benchmark adrianv