Using newline character as part of mask attack

[ajaxdecbe]

Guys,

Thanks for the quick responses. I was having a typo. The below syntax worked.

hashcat64 -a 3 -m 20 -O --hex-salt hash.txt ?a?a?a

-m 20 with mask was 5x faster than -m 0 with mask.

That being said, are there any other method to further optimize or improve performance here?