Not yet . It overlaps with some other work and will be done in due course.
luke
On Mon, 5 Dec 2011, Michael Spiegel wrote:
Has there been any movement on this patch? It will improve the
serialize/unserialize performance.
Thanks,
--Michael
On Mon, Oct 3, 2011 at 9:28 AM, <luke-tier...@uiowa.edu> wrote:
It's on my list to look at but I may not get to it for a couple of
weeks. Someone else may get there earlier.
Best,
luke
On Mon, 3 Oct 2011, Michael Spiegel wrote:
Any thoughts? I haven't heard any feedback on this patch.
Thanks!
--Michael
On Wed, Sep 28, 2011 at 3:10 PM, Michael Spiegel
<michael.m.spie...@gmail.com> wrote:
Hi folks,
I've attached a patch to the svn trunk that improves the performance
of the serialize/unserialize interface for vector types. The current
implementation: a) invokes the R_XDREncode operation for each element
of the vector type, and b) uses a switch statement to determine the
stream type for each element of the vector type. I've added
R_XDREncodeVector/R_XDRDecodeVector functions that accept N elements
at a time, and I've reorganized the implementation so that the stream
type is not queried once per element.
In the following microbenchmark (below), I've observed performance
improvements of about x2.4. In a real benchmark that is using the
serialization interface to make MPI calls, I see about a 10%
improvement in performance.
Cheers,
--Michael
microbenchmark:
input <- matrix(1:100000000, 10000, 10000)
output <- serialize(input, NULL)
for(i in 1:10) { print(system.time(serialize(input, NULL))) }
for(i in 1:10) { print(system.time(unserialize(output))) }
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Luke Tierney
Chair, Statistics and Actuarial Science
Ralph E. Wareham Professor of Mathematical Sciences
University of Iowa Phone: 319-335-3386
Department of Statistics and Fax: 319-335-3017
Actuarial Science
241 Schaeffer Hall email: l...@stat.uiowa.edu
Iowa City, IA 52242 WWW: http://www.stat.uiowa.edu
______________________________________________
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--
Luke Tierney
Chair, Statistics and Actuarial Science
Ralph E. Wareham Professor of Mathematical Sciences
University of Iowa Phone: 319-335-3386
Department of Statistics and Fax: 319-335-3017
Actuarial Science
241 Schaeffer Hall email: luke-tier...@uiowa.edu
Iowa City, IA 52242 WWW: http://www.stat.uiowa.edu
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