Tantivy is a full text search engine library written in rust. It is closer to Lucene than to Elastic Search and Solr in the sense it is not an off-the-shelf search engine server, but rather a crate that can be used to build such a search engine.

Its features include:

Full-text search
Configurable tokenizer (stemming available for 17 Latin languages with third party support for Chinese (tantivy-jieba and cang-jie), Japanese (lindera and tantivy-tokenizer-tiny-segmenter) and Korean (lindera + lindera-ko-dic-builder)
Fast (check out the 🐎 ✨ benchmark ✨ 🐎)
Tiny startup time (<10ms), perfect for command line tools
BM25 scoring (the same as Lucene)
Natural query language (e.g. (michael AND jackson) OR "king of pop")
Phrase queries search (e.g. "michael jackson")
Incremental indexing
Multithreaded indexing (indexing English Wikipedia takes < 3 minutes on my desktop)
Mmap directory
SIMD integer compression when the platform/CPU includes the SSE2 instruction set
Single valued and multivalued u64, i64, and f64 fast fields (equivalent of doc values in Lucene)
&[u8] fast fields
Text, i64, u64, f64, dates, and hierarchical facet fields
LZ4 compressed document store
Range queries
Faceted search
Configurable indexing (optional term frequency and position indexing)
Cheesy logo with a horse

Suggested keywords:

Lucene.Net - Lucene port in CSharp

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