05-10-2020, 04:20 PM
As a comparison:
$ hashcat --keyspace -a 3 ?a?a?a?a
857375
$ hashcat --keyspace -a 3 -1 ?l?u?d ?1?1?1?1
238328
So you're doing about 4x as much work by using ?a?a?a?a. Probably not enough of a reduction to go from "heat death of the universe" to "by lunchtime", but still worth fixing.
$ hashcat --keyspace -a 3 ?a?a?a?a
857375
$ hashcat --keyspace -a 3 -1 ?l?u?d ?1?1?1?1
238328
So you're doing about 4x as much work by using ?a?a?a?a. Probably not enough of a reduction to go from "heat death of the universe" to "by lunchtime", but still worth fixing.