Load ref on demand for each thread

[eaasna]

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.68%. Comparing base (83be767) to head (692641d).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #195      +/-   ##
==========================================
- Coverage   75.71%   75.68%   -0.03%     
==========================================
  Files          75       75              
  Lines        3788     3784       -4     
  Branches      511      511              
==========================================
- Hits         2868     2864       -4     
  Misses        920      920              

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