I have been busy studying data structure for the past week to partly refresh and partly deepen my understanding of the subject. The obvious side-effect of this is that I haven’t been able to spend much time coding. But hopefully this study effort will pay off.
Also, I’m firmly convinced that I need to spend significant amount of time studying on matrix computation essentials in order to be able to develop reasonably-fast matrix calculation algorithms (I got the book by the way). The algorithms I use for linear programming relies heavily on matrix operations, so this effort is absolutely important. And yes, I am aware that there are libraries out there that already do fast matrix computations, but using them without having some idea of what they may be doing internally bothers me quite a bit.
Meanwhile, my patch for fixing Calc’s erf/erfc functions (i55735) is proposed for 2.0.2. Jody helped me on minor performance improvement.