Use whole RAM Colab

[NoReply]

In some cases it is possible to get a bit more performance modifying -n and -u but I do not have any experience with these. When running a mask attack, the most important factor is the raw GPU power you have available. Since it seems you have no information about the underlying hardware of Colab, it is hard to tell whether this is fastest or not. It also depends on the iteration count of your specific hashes.