SilverNarcissus commented on issue #83: WIP: Initial bloom filter code 
contribution
URL: 
https://github.com/apache/commons-collections/pull/83#issuecomment-544770518
 
 
   For checking whether an object is in the bloom filter. Assuming we hash the 
object by 4 hash functions and there result is 1, 2000, 8888, 10000,. We only 
need to check whether 1, 2000, 8888, 10000 bit location in the array is 1. 
Creating a new bloom filter we need 10000 bits extra space and we have to 
compare all bits of the two array. If we do the checking operation 10000 times 
per second, may be there is an huge overhead.

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