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I quite enjoy minisearch[1] which is also 0 dependencies, actively maintained, and I expect would work well in a worker environment. I dropped it into a service worker and plugged it with a simple point in polygon script to enable geosearch for a recent project[2] and it played v. nicely.

[1] https://github.com/lucaong/minisearch

[2] https://github.com/theprojectsomething/re.places

Lyra author here: I wouldn't compare it with other JS search engines for a simple reason: we'll be targeting edge execution (Cloudflare workers, lambda@edge, etc.), so the focus is really different

Why does that matter? It seems you can run Lyra on the client and you can run other JS search engines on the "edge" (all that's needed is a JS runtime if I understand it correctly). It would be interesting to see how Lyra compares in these benchmarks.

We have a benchmark section in the repo and it's performing pretty well, we'll definitely run it against other engines!

Current version of FlexSearch (0.7.2) is not typo tolerant, see https://github.com/nextapps-de/flexsearch/issues/118