HACK: some ideas for place to optimize

[fingolfin]

• Optimize computation of least common denominator
• HACK: some ideas for place to optimize

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.11%. Comparing base (4d562bb) to head (e4e1f71).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #242   +/-   ##
=======================================
  Coverage   95.10%   95.11%           
=======================================
  Files          14       14           
  Lines         961      962    +1     
=======================================
+ Hits          914      915    +1     
  Misses         47       47           

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