posts: bloom-filter: add presentation

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Bruno BELANYI 2024-07-14 17:54:59 +01:00
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[wiki]: https://en.wikipedia.org/wiki/Bloom_filter [wiki]: https://en.wikipedia.org/wiki/Bloom_filter
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## What does it do?
A _Bloom Filter_ can be understood as a hash-set which can either tell you:
* An element is _not_ part of the set.
* An element _may be_ part of the set.
More specifically, one can tweak the parameters of the filter to make it so that
the _false positive_ rate of membership is quite low.
I won't be going into those calculations here, but they are quite trivial to
compute, or one can just look up appropriate values for their use case.