Refactor: optimize ArrayPoly.filterUniqueMapped()

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 93.20%. Comparing base (273ecca) to head (1d9f888).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1151 +/- ## ========================================== + Coverage 92.94% 93.20% +0.25% ========================================== Files 102 102 Lines 6364 6368 +4 Branches 1515 1410 -105 ========================================== + Hits 5915 5935 +20 - Misses 425 432 +7 + Partials 24 1 -23 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[github-actions[bot]]

:test_tube: Branch testing instructions

This pull request can be tested locally with the following command:

npm exec --yes -- "github:emmercm/igir#emmercm/filter-unique-mapped-efficiency" [commands..] [options]

Comment generated by the Pull Request Commenter workflow.