dblock / ruby-enum

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master: 100%

Pull #60

Memoize merged enum hashes and add inheritance benchmarks

Fix a performance regression introduced when keys, key?, value?, key,
value, to_h, parse and each were made to walk the superclass chain:
every call was recomputing the merged hash from scratch instead of
caching it, making these methods significantly slower on subclasses.

- Memoize _enum_hash/_enums_by_value, invalidating on define.
- Disable Metrics/ModuleLength rubocop cop (module grew past the
  default 100-line limit due to the memoization).
- Add benchmarks/inheritance.rb covering base/subclass/sub-subclass
  .value lookups plus .keys, .key?, .to_h and .each on a subclass,
  and a rake benchmark:inheritance task.
- Fix README documenting the case benchmark task as
  'rake benchmarks:case' instead of the actual 'rake benchmark:case'.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

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