Lower memory version of easymode

[stephen-riggs]

Brings in some of the code from easymode to allow a lower-memory running of it. No tests for this as it should be temporary and get removed again soon.

[codecov]

Codecov Report

❌ Patch coverage is 12.00000% with 66 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.22%. Comparing base (66670f2) to head (74b16a0).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #257      +/-   ##
==========================================
- Coverage   83.87%   83.22%   -0.66%     
==========================================
  Files          68       69       +1     
  Lines        8664     8738      +74     
  Branches     1170     1175       +5     
==========================================
+ Hits         7267     7272       +5     
- Misses        958     1027      +69     
  Partials      439      439              

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