Created a benchmarks file

[ngomezve]

This PR introduces a short file that users can run to benchmark some key parts of the code. This can help to diagnose issues with speed in the code, especially when comparing different versions.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.56%. Comparing base (93413cf) to head (0c555c6).
⚠️ Report is 8 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main       #8   +/-   ##
=======================================
  Coverage   81.56%   81.56%           
=======================================
  Files          12       12           
  Lines         792      792           
=======================================
  Hits          646      646           
  Misses        146      146           

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