New version of pqR, now with task merging

I’ve now released pqR-2013-12-29, a new version of my speedier implementation of R.  There’s a new website, pqR-project.org, as well, and a new logo, seen here. The big improvement in this version is that vector operations are sped up using task merging.

With task merging, several arithmetic operations on a vector may be merged into a single operation, reducing the time spent on memory stores and fetches of intermediate results. I was inspired to add task merging to pqR by Renjin and Riposte (see my post here and the subsequent discussion).

Netherlands Centennial Carillon, Victoria, BC