[R] question about performance on different operating systems

Peter Dalgaard BSA p.dalgaard at biostat.ku.dk
Wed Dec 12 22:52:14 CET 2001

Prof Brian Ripley <ripley at stats.ox.ac.uk> writes:

> In my experience R under Windows is about 10-20% slower than Linux on the
> same box. We know about 5% of the difference (polling vs interrupts) and
> th rest seems to be down to compiler quality (yes, they are both i686 gcc,
> but still not too similar compilers often giving different answers).

More likely library differences, I'd say. The actual compiled
instructions should be pretty much identical. Plus whatever weird
things are going on behind the scenes on Windows (and context switches
are extremely slow, at least on Win9x, so any amount of background
processing will detract from overall performance).

   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
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