is there a multithreads method for add value?

[LzyloveRila]

when add 1 billion values to the bloom filters, it cost nearly 4 hours on my server, I think it's possible to calculate hashes for batches of values in multithreads.

[mireklzicar]

My strategy was to create a lot of filters in parallel (lets say you have billion values; then you can create 1000 filters adding values to them in parallel) and then merge them using the .union() function.

[prashnts]

Multithreading won't necessarily help as adding/hashing is a CPU bound operation. @mireklzicar's approach is preferable.