Optimized array manipulation operations

Ilya Tyuryukanov 10 ár síðan updated by Pavel Holoborodko 9 ár síðan 2
I think it would be nice to speed up the logical indexing and other such array manipulation commands, because they are critical for many matrix- and vector-based algorithms. As for now, e.g. X(1:5) or X.' would take about 20 times more time if X is mp compared to double X (correct me if I'm wrong, or there's a way for speed increase). I know from the blog post that it was even slower earlier, but still such operations are very often and hence worth of optimization (IMHO).
Under review
Now toolbox has new engine for basic array manipulation operations, see http://goo.gl/mBJrk7
Basically it is up to 4 times faster (2 in average). Hopefully this be useful.