Problem

Testing revealed that sortEntries execution time increases significantly with larger prioritized input lists. The original implementation calls in.remove(name) for each prioritized entry, which rebuilds the entire stream (O(n) operation). When processing k prioritized files, this results in O(k·n) time complexity, causing severe performance degradation with large priority lists.

Solution

Instead of removing entries one by one, the optimized version:

1. Uses addRec to collect prioritized entries and mark them in a picked set
2. Performs a single O(n) filtering pass via dumpExcept to exclude marked entries
3. Concatenates prioritized and remaining entries