From gmbecker at ucdavis.edu  Tue Sep 29 23:51:53 2015
From: gmbecker at ucdavis.edu (Gabriel Becker)
Date: Tue, 29 Sep 2015 14:51:53 -0700
Subject: [Rd] making object.size() more meaningful on environments?
In-Reply-To: <560B05DF.9020103@fredhutch.org>
References: <560B05DF.9020103@fredhutch.org>
Message-ID: <CADwqtCPzwmYLSVoA+9jea5_sO3WUhN8ZseHfm-3yO2Lu2ao99g@mail.gmail.com>

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, Herv? Pag?s <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.
>
> --
> Herv? Pag?s
>
> 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
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>



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

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