Salted md5crypt speed question

[davejcb]

Quick question-

I've noticed that if I run a salted ($1$salt$hash) md5crypt hash in mask attack, I only get full speed if I run it by itself, with the single-hash optimizer.

If I run it with another salted, or unsalted hash, I get half the speed- is this normal?

Thanks!

[coolbry95]

That is because there are more salts to load.

[epixoip]

coolbry95 is correct. you have two salts, therefore each plaintext candidate needs to be hashed with each salt, cutting your effective speed in half. if you had 100 salts, your effective speed would be 100x slower.

[davejcb]

Makes sense, just wanted to confirm.

Thank you!