One note: if you've done everything correctly under the hood, instead of reading and writing the entire filter into and out of memory, just mmap the file and op

One note: if you've done everything correctly under the hood, instead of reading and writing the entire filter into and out of memory, just mmap the file and operate on it directly. It turns out to be pretty fast, especially on SSDs and you can make both many filters and test them quickly this way, or make filters that are practically larger than RAM and swap partitions and make absolutely enormous sets.