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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
You literally write the code in the language you prefer, and given the toolchain is in place -and it's in (experimental or preview) place for JavaScript, with teams working on it, like for example JCO- you can compile with Wasm as target.
In theory, if we ran lower level code, we would be using less resources. That's more than a theory. Go to this video where I demonstrate Pagefind, written in Rust and compiled to Wasm as target, as a static app that ingests and indexes HTML documents and runs super efficient search queries, all client-side.