R Observatory: Metrics for usl version 3.0.4

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

usl

3.0.4

Analyze System Scalability with the Universal Scalability Law

0packages depend

2.6Kdownloads / year

99.6%test coverage

13/13checks pass

Overview

About

Maintained by Stefan MoedingFirst published 2013-02-1020 releasesCRAN page ↗GitHub ↗

The Universal Scalability Law (Gunther 2007) doi:10.1007/978-3-540-31010-5 is a model to predict hardware and software scalability. It uses system capacity as a function of load to forecast the scalability for the system.

Install

R (CRAN)pak (dev)Ubuntu (r2u)Fedora (COPR)openSUSE (OBS)

install.packages("usl", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("smoeding/usl")

Development version from smoeding/usl. Installs pak first if it is not already available.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-usl

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled.

bspm (used by r2u) also needs make: sudo apt install make

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-usl

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-usl

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed).

Health

CRAN checks

13OK

Slowest check: 2.1 min · r-devel-windows-x86_64

Code health

Yes

Tests · ratio 0.56

99.6%

Coverage · measured lines

100%

Documentation · exports

4

Dependencies · direct

Check history

OK2026-08-04
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
NOTE2026-08-01
12 OK · 1 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
OK2026-06-08
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-06-07
12 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 224 wordsVignettesYes · dynamicpkgdown siteNoNEWSYes · 33% structuredCode of conductNoContributing guideNo

Examples that run: 93%
Documented parameters: 100%
Return-value docs: 100%
References docs: 33%

Downloads

2.6K

CRAN downloads in the past year

Rank #18,972 · ~7/day · ~219/mo

Releases R versions

Daily download trend is not available in this view yet.

14830 days

58790 days

2.6K1 year

Compare downloads with other packages →

Also on97 r2u16 autocran

Repository

GitHub ↗ smoeding/usl

36Stars

4Forks

0Open issues

0Open PRs

0Releases

298Commits

1Contributors

ruslscalabilityuniversal-scalability-law

298 commits · Last activity 2025-08-18

Stars over time

2025-06-24 · 362026-07-07 · 36

Repository practices

Upstream repositoryBeta

1 development-tooling and community-health practice detected across 1 family in the upstream repository

Checks run against github.com/smoeding/usl on 2026-08-09.

Continuous integration (1)

GitHub Actions

How this is detected·Detection ruleset v1 (2026-07-18)

Dependencies

Declared dependencies

2 external dependencies (excludes base and recommended)

Depends (2)

R >= 3.0methods

Imports (3)

graphicsstatsnlsr

LinkingTo (0)

none

Suggests (1)

knitr

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

Datasets

People & History

People (2)

Maintainer (1)

Stefan Moeding

Author, Maintainer

Authors (2)

Stefan Moeding

Author, Maintainer

Neil J. Gunther

Author

Package Timeline

20 releases. Pick two to compare their code metrics. R releases are shown for context.

R
R 4.6.0 released · 2026-04-24
3.0.4Latest
2025-08-18 · current release · diff ↗
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
R
R 4.3.0 released · 2023-04-21
3.0.3
2022-08-29 · diff ↗
3.0.2
2022-08-26 · diff ↗
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
R
R 4.0.0 released · 2020-04-24
3.0.0
2020-03-02 · diff ↗
2.0.0
2020-01-09 · diff ↗
R
R 3.6.0 released · 2019-04-26
R
R 3.5.0 released · 2018-04-23
1.8.0
2017-08-08 · diff ↗
R
R 3.4.0 released · 2017-04-21

Show 19 earlier events

1.7.0
2016-10-14 · diff ↗
1.6.0
2016-06-18 · diff ↗
R
R 3.3.0 released · 2016-05-03
1.5.0
2016-02-25 · diff ↗
R
R 3.2.0 released · 2015-04-16
1.4.1
2014-12-29 · diff ↗
1.4.0
2014-11-05 · diff ↗
1.3.1
2014-06-20 · diff ↗
1.3.0
2014-06-02 · diff ↗
R
R 3.1.0 released · 2014-04-10
1.2.2
2014-04-03 · diff ↗
1.2.1
2013-08-13 · diff ↗
3.0.1
2013-04-29 · diff ↗
1.2.0
2013-04-29 · diff ↗
R
R 3.0.0 released · 2013-04-03
2.15.3
2013-02-26 · diff ↗
1.1.0
2013-02-26 · diff ↗
1.0.0
2013-02-10
R
R 2.15.0 released · 2012-03-30

Package metadata

First published: 2013-02-10
Total releases: 20 / 13 yrs
License: BSD_2_clause + file LICENSE OSI
Minimum R: ≥ 3.0
Bundled data: 19 KB / 3 files
Download size: 274 KB
Installed size: not tracked yet
With dependencies: not tracked yet

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("usl")

Format

Moeding, S., & Gunther, N. J. (2025). usl: Analyze System Scalability with the Universal Scalability Law (Version 3.0.4) [Computer software]. https://doi.org/10.32614/CRAN.package.usl

This is what citation() produces when a package has no citation file of its own. If it prints something else, use that.

Cite the R Observatory

For a number measured here: a download total, a coverage figure, an archival date.

Format

APA

Balamuta, J. J. (2026). R Observatory: Metrics for usl version 3.0.4 [Data set]. HJJB, LLC. Data release v2026-08-13. https://doi.org/10.5281/zenodo.21843040

From data release v2026-08-13, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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