rapidbm25

rapidbm25

Drop-in, Rust-native replacement for rank_bm25's BM25Okapi, BM25L, and BM25Plus. Same constructor, same attributes, bit-for-bit identical scores, about 1,470× faster get_scores, plus a fast top_n, save/load, an incremental index, batch search, optional tokenizers, hybrid fusion, a ready-to-run MCP server, and an agent skill.

Install

pip install rapidbm25

Prebuilt wheels: CPython 3.9–3.15 on Linux (manylinux_2_28 and musllinux_1_2, x86_64 and aarch64), macOS (x86_64 10.13+ for CPython 3.9–3.13 and 10.15+ for 3.14–3.15, arm64 11.0+), and Windows (x86_64). Other platforms build from the sdist and need a Rust toolchain (1.85+).

Use

# from rank_bm25 import BM25Okapi
from rapidbm25 import BM25Okapi

docs = ["Hello there good man!", "It is quite windy in London", "How is the weather today?"]
bm25 = BM25Okapi([d.split(" ") for d in docs])        # also: tokenizer=..., k1, b, epsilon

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View the full README on GitHub