Courtesy of CRANberries, there is also a diffstat report for the most recent release As always, more detailed information is on the RcppArmadillo page. Questions, comments etc should go to the rcpp-devel mailing list off the R-Forge page.
Changes in RcppArmadillo version 0.4.200.0 (2014-04-07)
Upgraded to Armadillo release Version 4.200 (Flintlock Swoop)
faster transpose of sparse matrices
more efficient handling of aliasing during matrix multiplication
faster inverse of matrices marked as diagonal
This post by Dirk Eddelbuettel originated on his Thinking inside the box blog. Please report excessive re-aggregation in third-party for-profit settings.