On Fri, Jul 9, 2010 at 6:49 AM, Bryan W. Lewis <bwaynele...@gmail.com> wrote: > Dear R developers, > > The slow performance of serializing to a raw vector on Windows is an > issue that has appeared in this list before.
My guess is that you are referring to: [Rd] serialize() to via temporary file is heaps faster than doing it directly (on Windows), 2008-07-24 http://tolstoy.newcastle.edu.au/R/e4/devel/08/07/2355.html If so, that thread show how unnecessarily slow (5 mins instead of 5 secs) it is on Windows. > It appears to be due to > the frequent use of realloc from the resize_buffer method in > serialize.c. > > I suggest a more granular, but still incremental, re-allocation of > memory. For example change near the top of resize_buffer to: > > R_size_t newsize = needed + 65536 - (needed % 65536); > > or some other similar small multiple of a typical system page size. > > I have found this to dramatically improve performance of serialization > to raw vectors on Windows. I second this update, which seems to make serialize(..., connection=NULL) useful in Windows. Thxs, Henrik > > Best, > > Bryan > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
