This is naturally due to having large-ish dictionaries embedded: https://github.com/dropbox/zxcvbn/tree/master/data https://github.com/dropbox/zxcvbn/tree/maste

This is naturally due to having large-ish dictionaries embedded: https://github.com/dropbox/zxcvbn/tree/master/data https://github.com/dropbox/zxcvbn/tree/master/data Some people in the thread you linked to recommend lazy loading, another idea would be to use a bloom filter – I used this in a project to check server-side for hashes of (MMs of) common passwords.