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darwin-xnu
Discontinued Legacy mirror of Darwin Kernel. Replaced by https://github.com/apple-oss-distributions/xnu
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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.
That is a very good question and I don't know the answer, but if you want to go source code spelunking, you can probably find the answer on https://opensource.apple.com/
> Bloom filters are probabilistic data structures with an error rate due to data collisions. However, if you know the whole range of data that might be tested against the filter, you can compute all the false positives and build another layer to resolve those. Then you keep going until there are no more false positives. In practice, this happens in 25 to 30 layers, which results in substantial compression.
[0] https://github.com/mozilla/crlite/wiki#why-is-crlite-able-to...