search for: copyprofil

...works regardless of whether it's a matrix or not. Is there an alternative way to access "[.default"? * why does unclass() make deep copy? This is a facet of the global over-conservatism of R with respect to copying. * is it possible to add some sort copy profiling to R? Something like copyProfiling(TRUE), which should cause R to log sizes of each copied object (just raw sizes w/o any attempt to identify the object). This feature should at least help assess the magnitude of the problem. Thanks, Vadim Now the transcript itself: > # the motivation: subscription of a data.frame is *much*...