[Rd] making object.size() more meaningful on environments?

[Gabriel Becker]

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?

~G



On Tue, Sep 29, 2015 at 2:42 PM, Hervé Pagès <hpages at 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: hpages at fredhutch.org
> Phone:  (206) 667-5791
> Fax:    (206) 667-1319
>
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>



-- 
Gabriel Becker, PhD
Computational Biologist
Bioinformatics and Computational Biology
Genentech, Inc.

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