This is significantly more optimistic than Dropbox's zxcvbn [1]:

  Password                   hsimp                zxcvbn
  qwER43@!                   3 days               3 hours
  Tr0ub4dour&3               344 thousand years   22 hours
  correcthorsebatterystaple  A quintillion years  65 years

[1] https://github.com/dropbox/zxcvbn