The brute-force password cracker is an application written in C#, C++, Kotlin, and Python that brute forces a password that you pass to the function. Read more about brute force password crackers here.

The general idea is that it checks every possible character combination repeatedly until it matches the provided string. Note: Built into the Kotlin version are coroutines that have it check multiple lengths of a string at a time for as many cores as the processor you're using has. You can disable this feature and just have it run one length at a time. I've found that using multiple cores can speed up the overall process as it makes it easier for it to guess longer lengths faster.

Example output with coroutines:

a
aa
aaa
aaaa
b
ab
aab
aaab

Example output without coroutines:

a
b

Here are some statistics. All of these were run on the same Linux machine, so the runtime will obviously vary but it should give you a good idea of the speed differences between languages. Each program was tasked with finding the password zzzzzz. If you're language agnostic I highly recommend using C++.

Duration: 12 seconds

Passwords / second: 26,772,698

Duration: 6.31 seconds

Passwords / second: 50,914,804

Duration: > 5 minutes

Statistics coming soon...