https://github.com/rubocop/rubocop-performance

An extension of RuboCop focused on code performance checks.
https://github.com/rubocop/rubocop-performance

Keywords

code-formatter hacktoberfest linter rubocop ruby static-code-analysis

Keywords from Contributors

activerecord activejob mvc rspec rubygems rack static-analysis capybara gem sinatra

Last synced: about 13 hours ago
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Repository metadata

An extension of RuboCop focused on code performance checks.

Host: GitHub
URL: https://github.com/rubocop/rubocop-performance
Owner: rubocop
License: mit
Created: 2018-06-10T12:08:51.000Z (over 7 years ago)
Default Branch: master
Last Pushed: 2025-11-25T16:23:07.000Z (21 days ago)
Last Synced: 2025-12-07T12:27:34.910Z (9 days ago)
Topics: code-formatter, hacktoberfest, linter, rubocop, ruby, static-code-analysis
Language: Ruby
Homepage: https://docs.rubocop.org/rubocop-performance
Size: 24.8 MB
Stars: 724
Watchers: 10
Forks: 87
Open Issues: 64
Releases: 58
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Contributing: CONTRIBUTING.md
- Funding: .github/FUNDING.yml
- License: LICENSE.txt

RuboCop Performance

Performance optimization analysis for your projects, as an extension to RuboCop.

Installation

Just install the rubocop-performance gem

$ gem install rubocop-performance

or if you use bundler put this in your Gemfile

gem 'rubocop-performance', require: false

Usage

You need to tell RuboCop to load the Performance extension. There are three
ways to do this:

RuboCop configuration file

Put this into your .rubocop.yml.

plugins: rubocop-performance

Alternatively, use the following array notation when specifying multiple extensions.

plugins:
  - rubocop-other-extension
  - rubocop-performance

Now you can run rubocop and it will automatically load the RuboCop Performance
cops together with the standard cops.

[!NOTE]
The plugin system is supported in RuboCop 1.72+. In earlier versions, use require instead of plugins.

Command line

$ rubocop --plugin rubocop-performance

Rake task

require 'rubocop/rake_task'

RuboCop::RakeTask.new do |task|
  task.plugins << 'rubocop-performance'
end

The Cops

All cops are located under
lib/rubocop/cop/performance, and contain
examples/documentation.

In your .rubocop.yml, you may treat the Performance cops just like any other
cop. For example:

Performance/Size:
  Exclude:
    - lib/example.rb

Documentation

You can read a lot more about RuboCop Performance in its official docs.

Compatibility

RuboCop Performance is compatible with RuboCop core.

See the compatibility documentation for further details.

Note: Performance cops are all MRI focused and are highly dependent of the version of MRI you're using.

Contributing

Checkout the contribution guidelines.

License

rubocop-performance is MIT licensed. See the accompanying file for
the full text.

Owner metadata

Name: RuboCop Headquarters
Login: rubocop
Email:
Kind: organization
Description: We're committed to promoting the best Ruby programming practices and helping people write better Ruby applications.
Website: https://rubocop.org
Location:
Twitter:
Company:
Icon url: https://avatars.githubusercontent.com/u/10871348?v=4
Repositories: 28
Last ynced at: 2024-03-25T19:40:52.798Z
Profile URL: https://github.com/rubocop

GitHub Events

Total

Create event: 6
Release event: 4
Issues event: 18
Watch event: 37
Delete event: 1
Issue comment event: 60
Push event: 54
Pull request event: 50
Pull request review event: 40
Pull request review comment event: 38
Fork event: 7

Last Year

Create event: 5
Release event: 4
Issues event: 16
Watch event: 31
Delete event: 1
Issue comment event: 41
Push event: 49
Pull request review event: 30
Pull request review comment event: 30
Pull request event: 45
Fork event: 6

Committers metadata

Last synced: about 14 hours ago

Total Commits: 905
Total Committers: 79
Avg Commits per committer: 11.456
Development Distribution Score (DDS): 0.42

Commits in past year: 61
Committers in past year: 9
Avg Commits per committer in past year: 6.778
Development Distribution Score (DDS) in past year: 0.344

Name	Email	Commits
Koichi ITO	k**o@g**m	525
Ryan Rosenblum	r**m@g**m	67
fatkodima	f**3@g**m	30
Alex Dowad	a**g@g**m	28
Ted Johansson	d**i@g**m	26
Masataka Kuwabara	k**a@p**e	22
Teemu	t**u@a**n	19
Earlopain	1****n	17
John Backus	j**s@g**m	16
Jonas Arvidsson	j**4@g**m	9
viralpraxis	i**k@g**m	8
Eugene Kenny	e**y@g**m	7
Daniel Vandersluis	d**s@g**m	7
Garett Arrowood	g**d@g**m	7
palkan	d**m@g**m	6
Samuel Giddins	s**s@s**e	6
Daniel Colson	d**n@g**m	6
Bozhidar Batsov	b**r@b**m	6
dependabot[bot]	4****]	5
ydah	1****h	5
Piotr Szotkowski	c**l@c**t	4
Ryo Nakamura	r**a@g**m	4
Tejas Bubane	t**e@g**m	3
Leo Arnold	g**b@l**e	3
Parker Finch	p**h@p**m	3
Benjamin Quorning	b**n@q**t	3
Ryusuke Homma	r**a@u**m	2
Michael Siegfried	m**l@p**m	2
Viktar Basharymau	v**u@g**m	2
ymap	y**v@g**m	2
and 49 more...

Committer domains:

Issue and Pull Request metadata

Last synced: 1 day ago

Total issues: 112
Total pull requests: 192
Average time to close issues: about 1 month
Average time to close pull requests: about 1 month
Total issue authors: 61
Total pull request authors: 36
Average comments per issue: 1.18
Average comments per pull request: 0.99
Merged pull request: 150
Bot issues: 0
Bot pull requests: 5

Past year issues: 13
Past year pull requests: 45
Past year average time to close issues: 3 days
Past year average time to close pull requests: 4 days
Past year issue authors: 10
Past year pull request authors: 12
Past year average comments per issue: 0.69
Past year average comments per pull request: 0.49
Past year merged pull request: 35
Past year bot issues: 0
Past year bot pull requests: 2

More stats: https://issues.ecosyste.ms/repositories/lookup?url=https://github.com/rubocop/rubocop-performance

Top Issue Authors

ydakuka (30)
vlad-pisanov (6)
fatkodima (5)
forthrin (4)
Earlopain (2)
corsonknowles (2)
dgollahon (2)
DannyBen (2)
MatzFan (2)
viralpraxis (2)
wteuber (2)
amomchilov (2)
tagliala (2)
TastyPi (2)
sambostock (1)

Top Pull Request Authors

koic (66)
Earlopain (27)
viralpraxis (16)
fatkodima (11)
r7kamura (6)
ydah (6)
dvandersluis (6)
dependabot[bot] (5)
amomchilov (4)
leoarnold (4)
corsonknowles (4)
mvz (2)
a-lavis (2)
parkerfinch (2)
okuramasafumi (2)

Top Issue Labels

bug (21)
enhancement (17)
duplicate (1)

Top Pull Request Labels

dependencies (5)
github_actions (2)

Package metadata

Total packages: 3
Total downloads:
- rubygems: 524,304,283 total
Total docker downloads: 1,413,541,478
Total dependent packages: 1,623 (may contain duplicates)
Total dependent repositories: 28,810 (may contain duplicates)
Total versions: 294
Total maintainers: 2

gem.coop: rubocop-performance

A collection of RuboCop cops to check for performance optimizations in Ruby code.

Homepage: https://docs.rubocop.org/rubocop-performance/
Documentation: http://www.rubydoc.info/gems/rubocop-performance/
Licenses: MIT
Latest release: 1.26.1 (published about 2 months ago)
Last Synced: 2025-12-15T23:02:17.592Z (1 day ago)
Versions: 60
Dependent Packages: 0
Dependent Repositories: 0
Downloads: 262,194,814 Total
Docker Downloads: 706,770,739
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 0.057%
- Downloads: 0.097%
- Docker downloads count: 0.13%
Maintainers (2)
- koic_ito
- bbatsov

rubygems.org: rubocop-performance