RegexPhraseQuery and HyperLogLog++ cardinality aggregation ship alongside 45% memory reduction in top_hits and fixed merge crashes for multivalued indices >4GB.
Summary
If you're building search on Rust, the regex phrase support and cardinality aggregation cut implementation friction for complex queries. Memory and merge fixes remove production footguns—especially the u32→usize bitpacker swap that previously crashed on large multivalued columns.
Why it matters
If you're building search on Rust, the regex phrase support and cardinality aggregation cut implementation friction for complex queries. Memory and merge fixes remove production footguns—especially the u32→usize bitpacker swap that previously crashed on large multivalued columns.
Implementation verdict
Drop-in upgrade for existing Tantivy users. No breaking changes except removed index sorting (likely unused). Worth upgrading now if you run multivalued indices or phrase-heavy workloads. RegexPhraseQuery is immediately useful for permissive match patterns.
Sources
Dev Signal
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