Replace default_cache_type with first

[valeriupredoi]

Description

Replacing default_cache_type to first (the recommended type when dealing with HDF5 files - many thanks @martindurant 🍺 ) has a significant impact on timing performance.

Checklist

• This pull request has a descriptive title and labels
• This pull request has a minimal description (most was discussed in the issue, but a two-liner description is still desirable)
• [ ] Unit tests have been added (if codecov test fails)
• [ ] Any changed dependencies have been added or removed correctly (if need be)
• All tests pass

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.40%. Comparing base (fe79079) to head (b476252).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #185   +/-   ##
=======================================
  Coverage   88.40%   88.40%           
=======================================
  Files           8        8           
  Lines         664      664           
=======================================
  Hits          587      587           
  Misses         77       77           

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