[Rd] Wish list

Frank E Harrell Jr feh3k at spamcop.net
Mon Jan 19 19:03:16 MET 2004

On Mon, 19 Jan 2004 17:17:39 +0000 (GMT)
Prof Brian Ripley <ripley at stats.ox.ac.uk> wrote:

> Are you sure there is a measurable difference in calling methods
> directly? The dispatch overhead on formula (one of your uses) appears to
> be about 10 microseconds.  (Note, negligible even for 10,000
> bootstraps.)
> I believe we took the real performance penalties into account (and 
> namespaces had performance pluses as well as minuses).


I don't worry about dispatch overhead.  I do worry about overhead of
assembling model matrices, removing rows with NAs, etc.  -Frank

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