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  • Performance improvements for faceting, including a new protected API to control which fields are counted for drill-down during drill sideways
  • Multi-valued fields are now supported in numeric range facet counting
  • RegexpQuery's detection of Adversarial adversarial (ReDoS) regular expressions is improved, catching exotic cases that it missed before, and throwing TooComplexToDeterminizeException
  • Speedup for computing the leading prefix and trailing suffix from an Automaton, and for managing powersets during determinize
  • Speedups for stored fields retrieval
  • ForceMerge will now merge any number of segments at once, making it much faster in many cases
  • Compression improvements for docvalues storage
  • Added new analyzer for Telugu
  • Near-real-time readers opened from an IndexCommit can now sort their leaves

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