[R] Lazy loading... advices

Philippe Grosjean
Sun, 17 Oct 2004 16:33:50 -0000

Problem solved! Adding a namespace speed up loading of my package by almost
30 times (around 1 sec)!

Best,

Philippe Grosjean

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of
> Philippe Grosjean
> Sent: Saturday, October 16, 2004 4:37 PM
> To: r-help at stat.math.ethz.ch
> Subject: [R] Lazy loading... advices
>
> Hello,
>
> I am looking for more information about lazy loading
> introduced in R 2.0.0.
> Doing
> ?lazyLoad
> I got some and there is a 'see also' section that points to
> 'makeLazyLoading'... But I cannot reach this page.
>
> My problem is: I recompiled a library that uses a lot of
> functions from other libraries (of course I can give details
> if needed). I load it in my
> computer: library(svGUI), and it takes something like 20
> seconds to load. In R 1.9.1 it took 3-4 seconds on the same
> machine (Windows XP). So, I try now to understand the
> mechanism and to find a way to lower the loading time of this
> library with lazy loading (its goal is to load faster, isn't,
> so I probably do something wrong).
>
> Any help or advice would be appreciated.
>
> Here is a Rprof of library(svGUI) on my machine:
>
> ?? summaryRprof()
> $by.self
>                         self.time self.pct total.time total.pct
> file.exists                  7.42     24.9       8.46      28.4
> list.files                   7.24     24.3       7.32      24.6
> file                         6.78     22.8       6.88      23.1
> read.dcf                     1.42      4.8       9.24      31.0
> file.info                    0.54      1.8       0.82       2.8
> lapply                       0.52      1.7       8.96      30.1
> inherits                     0.34      1.1      28.76      96.5
> names                        0.34      1.1       0.38       1.3
> names<-                      0.30      1.0       0.42       1.4
> paste                        0.30      1.0       0.66       2.2
> close.connection             0.24      0.8       0.24       0.8
> .Call                        0.20      0.7       0.20       0.7
> apply                        0.20      0.7       0.58       1.9
> .find.package                0.18      0.6      18.14      60.9
> [... More here]
>
> $by.total
>                         total.time total.pct self.time self.pct
> library                      29.70      99.7      0.00      0.0
> try                          29.64      99.5      0.10      0.3
> f                            29.36      98.5      0.00      0.0
> firstlib                     29.36      98.5      0.00      0.0
> Require                      28.96      97.2      0.00      0.0
> match                        28.80      96.6      0.08      0.3
> inherits                     28.76      96.5      0.34      1.1
> is.factor                    28.76      96.5      0.00      0.0
> %in%                         28.60      96.0      0.00      0.0
> installed.packages           28.60      96.0      0.00      0.0
> unlist                       21.46      72.0      0.08      0.3
> packageDescription           21.22      71.2      0.10      0.3
> system.file                  19.18      64.4      0.08      0.3
> .find.package                18.14      60.9      0.18      0.6
> guiInstall                   11.82      39.7      0.00      0.0
> read.dcf                      9.24      31.0      1.42      4.8
> lapply                        8.96      30.1      0.52      1.7
> file.exists                   8.46      28.4      7.42     24.9
> FUN                           7.82      26.2      0.02      0.1
> list.files                    7.32      24.6      7.24     24.3
> .packages                     7.20      24.2      0.02      0.1
> file                          6.88      23.1      6.78     22.8
> require                       3.42      11.5      0.00      0.0
> [... More here]
>
> This is the description of my package (in the bundle SciViews):
>
> Package: svGUI
> Title: SciViews GUI API - Main GUI features
> Description: Functions to communicate with a GUI client, to
> implement an object browser, etc...
> Bundle: SciViews
> Version: 0.7-0
> Date: 2004-10-10
> Depends: utils, grDevices, graphics, stats, methods, tcltk,
> R2HTML, svMisc
> Suggests: Hmisc, MASS, wxPython
> Author: Philippe Grosjean & Eric Lecoutre
> Maintainer: Philippe Grosjean <phgrosjean at sciviews.org>
> BundleDescription: SciViews GUI API
>   A series of packages to implement a full reusable GUI API for R.
> License: GPL 2 or above
> URL: http://www.sciviews.org/SciViews-R
>
> Thank you.
> Best,
>
> Philippe Grosjean
>
> ..............................................<??}))><........
>  ) ) ) ) )
> ( ( ( ( (    Prof. Philippe Grosjean
>  ) ) ) ) )
> ( ( ( ( (    Numerical Ecology of Aquatic Systems
>  ) ) ) ) )   Mons-Hainaut University, Pentagone
> ( ( ( ( (    Academie Universitaire Wallonie-Bruxelles
>  ) ) ) ) )   6, av du Champ de Mars, 7000 Mons, Belgium
> ( ( ( ( (
>  ) ) ) ) )   phone: + 32.65.37.34.97, fax: + 32.65.37.33.12
> ( ( ( ( (    email: Philippe.Grosjean at umh.ac.be
>  ) ) ) ) )
> ( ( ( ( (    web:   http://www.umh.ac.be/~econum
>  ) ) ) ) )
> ..............................................................
>
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