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1b86d90136
In Ruby 2.3 or later, `String#+@` is available and `+@` is faster than `dup`. ```ruby # frozen_string_literal: true require "bundler/inline" gemfile(true) do source "https://rubygems.org" gem "benchmark-ips" end Benchmark.ips do |x| x.report('+@') { +"" } x.report('dup') { "".dup } x.compare! end ``` ``` $ ruby -v benchmark.rb ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-linux] Warming up -------------------------------------- +@ 282.289k i/100ms dup 187.638k i/100ms Calculating ------------------------------------- +@ 6.775M (± 3.6%) i/s - 33.875M in 5.006253s dup 3.320M (± 2.2%) i/s - 16.700M in 5.032125s Comparison: +@: 6775299.3 i/s dup: 3320400.7 i/s - 2.04x slower ```
213 lines
4.3 KiB
YAML
213 lines
4.3 KiB
YAML
AllCops:
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TargetRubyVersion: 2.4
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# RuboCop has a bunch of cops enabled by default. This setting tells RuboCop
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# to ignore them, so only the ones explicitly set in this file are enabled.
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DisabledByDefault: true
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Exclude:
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- '**/templates/**/*'
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- '**/vendor/**/*'
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- 'actionpack/lib/action_dispatch/journey/parser.rb'
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- 'railties/test/fixtures/tmp/**/*'
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Performance:
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Exclude:
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- '**/test/**/*'
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Rails:
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Enabled: true
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# Prefer assert_not over assert !
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Rails/AssertNot:
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Include:
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- '**/test/**/*'
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# Prefer assert_not_x over refute_x
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Rails/RefuteMethods:
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Include:
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- '**/test/**/*'
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# Prefer &&/|| over and/or.
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Style/AndOr:
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Enabled: true
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# Do not use braces for hash literals when they are the last argument of a
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# method call.
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Style/BracesAroundHashParameters:
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Enabled: true
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EnforcedStyle: context_dependent
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# Align `when` with `case`.
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Layout/CaseIndentation:
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Enabled: true
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# Align comments with method definitions.
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Layout/CommentIndentation:
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Enabled: true
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Layout/ElseAlignment:
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Enabled: true
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# Align `end` with the matching keyword or starting expression except for
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# assignments, where it should be aligned with the LHS.
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Layout/EndAlignment:
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Enabled: true
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EnforcedStyleAlignWith: variable
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AutoCorrect: true
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Layout/EmptyLineAfterMagicComment:
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Enabled: true
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Layout/EmptyLinesAroundBlockBody:
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Enabled: true
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# In a regular class definition, no empty lines around the body.
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Layout/EmptyLinesAroundClassBody:
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Enabled: true
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# In a regular method definition, no empty lines around the body.
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Layout/EmptyLinesAroundMethodBody:
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Enabled: true
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# In a regular module definition, no empty lines around the body.
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Layout/EmptyLinesAroundModuleBody:
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Enabled: true
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Layout/FirstParameterIndentation:
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Enabled: true
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# Use Ruby >= 1.9 syntax for hashes. Prefer { a: :b } over { :a => :b }.
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Style/HashSyntax:
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Enabled: true
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# Method definitions after `private` or `protected` isolated calls need one
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# extra level of indentation.
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Layout/IndentationConsistency:
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Enabled: true
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EnforcedStyle: rails
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# Two spaces, no tabs (for indentation).
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Layout/IndentationWidth:
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Enabled: true
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Layout/LeadingCommentSpace:
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Enabled: true
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Layout/SpaceAfterColon:
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Enabled: true
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Layout/SpaceAfterComma:
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Enabled: true
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Layout/SpaceAroundEqualsInParameterDefault:
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Enabled: true
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Layout/SpaceAroundKeyword:
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Enabled: true
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Layout/SpaceAroundOperators:
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Enabled: true
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Layout/SpaceBeforeComma:
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Enabled: true
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Layout/SpaceBeforeFirstArg:
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Enabled: true
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Style/DefWithParentheses:
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Enabled: true
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# Defining a method with parameters needs parentheses.
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Style/MethodDefParentheses:
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Enabled: true
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Style/FrozenStringLiteralComment:
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Enabled: true
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EnforcedStyle: always
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Exclude:
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- 'actionview/test/**/*.builder'
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- 'actionview/test/**/*.ruby'
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- 'actionpack/test/**/*.builder'
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- 'actionpack/test/**/*.ruby'
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- 'activestorage/db/migrate/**/*.rb'
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# Use `foo {}` not `foo{}`.
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Layout/SpaceBeforeBlockBraces:
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Enabled: true
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# Use `foo { bar }` not `foo {bar}`.
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Layout/SpaceInsideBlockBraces:
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Enabled: true
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# Use `{ a: 1 }` not `{a:1}`.
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Layout/SpaceInsideHashLiteralBraces:
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Enabled: true
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Layout/SpaceInsideParens:
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Enabled: true
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# Check quotes usage according to lint rule below.
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Style/StringLiterals:
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Enabled: true
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EnforcedStyle: double_quotes
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# Detect hard tabs, no hard tabs.
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Layout/Tab:
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Enabled: true
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# Blank lines should not have any spaces.
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Layout/TrailingBlankLines:
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Enabled: true
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# No trailing whitespace.
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Layout/TrailingWhitespace:
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Enabled: true
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# Use quotes for string literals when they are enough.
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Style/UnneededPercentQ:
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Enabled: true
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# Use my_method(my_arg) not my_method( my_arg ) or my_method my_arg.
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Lint/RequireParentheses:
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Enabled: true
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Lint/StringConversionInInterpolation:
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Enabled: true
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Lint/UriEscapeUnescape:
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Enabled: true
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Style/ParenthesesAroundCondition:
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Enabled: true
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Style/RedundantReturn:
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Enabled: true
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AllowMultipleReturnValues: true
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Style/Semicolon:
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Enabled: true
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AllowAsExpressionSeparator: true
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# Prefer Foo.method over Foo::method
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Style/ColonMethodCall:
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Enabled: true
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Style/TrivialAccessors:
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Enabled: true
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Performance/FlatMap:
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Enabled: true
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Performance/RedundantMerge:
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Enabled: true
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Performance/StartWith:
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Enabled: true
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Performance/EndWith:
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Enabled: true
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Performance/RegexpMatch:
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Enabled: true
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Performance/UnfreezeString:
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Enabled: true
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