Save lookup computation in blake

[spapinistarkware]

This change is 

[spapinistarkware]

• Save lookup computation in blake #815 👈
• dev

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.28%. Comparing base (e3858fb) to head (1cebae1).
Report is 6 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #815      +/-   ##
==========================================
+ Coverage   92.18%   92.28%   +0.10%     
==========================================
  Files          90       92       +2     
  Lines       12473    12579     +106     
  Branches    12473    12579     +106     
==========================================
+ Hits        11498    11609     +111     
+ Misses        864      861       -3     
+ Partials      111      109       -2     

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[andrewmilson]

Reviewable status: 0 of 3 files reviewed, all discussions resolved