Andreas Raab wrote:

>>Oho!  I hadn't noticed that.  That brings the time from 174s 
>>down to 90s.
>>    
>>
>
>Profiling is your friend ;-) I loaded the code saw ~40% spent in
>FloatArray>>dot: and wondered why ;-)
>
Yes, and with a little bit more profiling just now I brought it down to 
40s...