Hi Gabe,
On 09/29/2015 02:51 PM, Gabriel Becker wrote:
Herve,
The problem then would be that for A a refClass whose fields take up N
bytes (in the sense that you mean), if we do
B <- A
A and B would look like the BOTH take up N bytes, for a total of 2N,
whereas AFAIK R would only be using ~ N + 2*56 bytes, right?
Yes, but that's still a *much* better situation than the current one in
my opinion. More generally speaking counting shared memory for each
object (or process) that uses it is a common, sensible, and accepted
approach. No need to look far: a character vector is just a collection
of pointers to stuff that is shared thru the global CHARSXP cache and
AFAIK object.size() takes this stuff into account.
H.
~G
On Tue, Sep 29, 2015 at 2:42 PM, Hervé Pagès <hpa...@fredhutch.org
<mailto:hpa...@fredhutch.org>> wrote:
Hi,
Currently object.size() is not very useful on environments as it always
returns 56 bytes, no matter how big the environment is:
env1 <- new.env()
object.size(env1) # 56 bytes
env2 <- new.env(hash=TRUE, size=75000000L)
object.size(env2) # 56 bytes
env3 <- list2env(list(a=runif(25000000), L=LETTERS))
object.size(env3) # 56 bytes
This makes it pretty useless on reference class instances and other
objects that use environments internally for caching or other purposes.
What about changing this and make it return something more meaningful?
Cheers,
H.
--
Hervé Pagès
Program in Computational Biology
Division of Public Health Sciences
Fred Hutchinson Cancer Research Center
1100 Fairview Ave. N, M1-B514
P.O. Box 19024
Seattle, WA 98109-1024
E-mail: hpa...@fredhutch.org <mailto:hpa...@fredhutch.org>
Phone: (206) 667-5791 <tel:%28206%29%20667-5791>
Fax: (206) 667-1319 <tel:%28206%29%20667-1319>
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--
Gabriel Becker, PhD
Computational Biologist
Bioinformatics and Computational Biology
Genentech, Inc.
--
Hervé Pagès
Program in Computational Biology
Division of Public Health Sciences
Fred Hutchinson Cancer Research Center
1100 Fairview Ave. N, M1-B514
P.O. Box 19024
Seattle, WA 98109-1024
E-mail: hpa...@fredhutch.org
Phone: (206) 667-5791
Fax: (206) 667-1319
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