What is the max count number

[bitly]

What is the max count number

[ploxiln]

Do you mean, the maximum number of times the same key can be added?

The counters are 4 bits, so they can count from 0 up to 15. But there are collisions of individual bits in a bloom filter (which is what allows it to "record" the fingerprint of more keys than a hash table in the same amount of space). So I'd suggest not adding more than 2 or 3 of the exact same key.

So, it's not really useful for adding multiple of the same key. You should probably make sure you only add one of a particular key, by checking before adding. The counting is only sufficient to allow you to remove a key, even with the inevitable collisions of some bits. The bins count up enough that if you're getting enough collisions to overflow some counts from unique keys, the bloom filter is way too full already, the scalable bloom filter would have already started on a new bloom.

Also, this repo isn't really maintained anymore, fwiw :)