low performance with prepend more than 3 characters in mask attack

[epixoip]

Benchmark mode performs a single hash brute force of a large keyspace, an ideal scenario that presents the opportunity for maximum optimization. Many of the optimizations are not applicable when attacking multiple hashes or using other attack modes.

The reason why replacing ?l with the single character "n" results in dramatically lower speed is that the left side of the mask is now too small to gain full acceleration.