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# Department 'Performance' (50): 미수정
# Supports --autocorrect
Performance/AncestorsInclude:
Description: Use `A <= B` instead of `A.ancestors.include?(B)`.
Reference: https://github.com/fastruby/fast-ruby#ancestorsinclude-vs--code
Enabled: false
Safe: false
VersionAdded: '1.7'
# Supports --autocorrect
Performance/ArraySemiInfiniteRangeSlice:
Description: Identifies places where slicing arrays with semi-infinite ranges can
be replaced by `Array#take` and `Array#drop`.
Enabled: false
Safe: false
VersionAdded: '1.9'
# Supports --autocorrect
Performance/BigDecimalWithNumericArgument:
Description: Convert numeric literal to string and pass it to `BigDecimal`.
Enabled: false
VersionAdded: '1.7'
# Supports --autocorrect
Performance/BindCall:
Description: Use `bind_call(obj, args, ...)` instead of `bind(obj).call(args, ...)`.
Enabled: false
VersionAdded: '1.6'
# Supports --autocorrect
Performance/BlockGivenWithExplicitBlock:
Description: Check block argument explicitly instead of using `block_given?`.
Enabled: false
VersionAdded: '1.9'
# Supports --autocorrect
Performance/Caller:
Description: Use `caller(n..n)` instead of `caller`.
Enabled: false
VersionAdded: '0.49'
VersionChanged: '1.9'
# Supports --autocorrect
Performance/CaseWhenSplat:
Description: Reordering `when` conditions with a splat to the end of the `when` branches
can improve performance.
Enabled: false
SafeAutoCorrect: false
VersionAdded: '0.34'
VersionChanged: '1.13'
# Supports --autocorrect
Performance/Casecmp:
Description: Use `casecmp` rather than `downcase ==`, `upcase ==`, `== downcase`,
or `== upcase`..
Reference: https://github.com/fastruby/fast-ruby#stringcasecmp-vs--stringcasecmp-vs-stringdowncase---code
Enabled: false
Safe: false
VersionAdded: '0.36'
VersionChanged: '1.21'
Performance/ChainArrayAllocation:
Description: Instead of chaining array methods that allocate new arrays, mutate an
existing array.
Reference: https://twitter.com/schneems/status/1034123879978029057
Enabled: false
VersionAdded: '0.59'
Performance/CollectionLiteralInLoop:
Description: Extract Array and Hash literals outside of loops into local variables
or constants.
Enabled: false
VersionAdded: '1.8'
MinSize: 1
# Supports --autocorrect
Performance/CompareWithBlock:
Description: Use `sort_by(&:foo)` instead of `sort { |a, b| a.foo <=> b.foo }`.
Enabled: false
VersionAdded: '0.46'
# Supports --autocorrect
Performance/ConcurrentMonotonicTime:
Description: Use `Process.clock_gettime(Process::CLOCK_MONOTONIC)` instead of `Concurrent.monotonic_time`.
Reference: https://github.com/rails/rails/pull/43502
Enabled: false
VersionAdded: '1.12'
# Supports --autocorrect
Performance/ConstantRegexp:
Description: Finds regular expressions with dynamic components that are all constants.
Enabled: false
VersionAdded: '1.9'
VersionChanged: '1.10'
# Supports --autocorrect
Performance/Count:
Description: Use `count` instead of `{select,find_all,filter,reject}...{size,count,length}`.
SafeAutoCorrect: false
Enabled: false
VersionAdded: '0.31'
VersionChanged: '1.8'
# Supports --autocorrect
Performance/DeletePrefix:
Description: Use `delete_prefix` instead of `gsub`.
Enabled: false
Safe: false
SafeMultiline: true
VersionAdded: '1.6'
VersionChanged: '1.11'
# Supports --autocorrect
Performance/DeleteSuffix:
Description: Use `delete_suffix` instead of `gsub`.
Enabled: false
Safe: false
SafeMultiline: true
VersionAdded: '1.6'
VersionChanged: '1.11'
# Supports --autocorrect
Performance/Detect:
Description: Use `detect` instead of `select.first`, `find_all.first`, `filter.first`,
`select.last`, `find_all.last`, and `filter.last`.
Reference: https://github.com/fastruby/fast-ruby#enumerabledetect-vs-enumerableselectfirst-code
SafeAutoCorrect: false
Enabled: false
VersionAdded: '0.30'
VersionChanged: '1.8'
# Supports --autocorrect
Performance/DoubleStartEndWith:
Description: Use `str.{start,end}_with?(x, ..., y, ...)` instead of `str.{start,end}_with?(x,
...) || str.{start,end}_with?(y, ...)`.
Enabled: false
VersionAdded: '0.36'
VersionChanged: '0.48'
IncludeActiveSupportAliases: false
# Supports --autocorrect
Performance/EndWith:
Description: Use `end_with?` instead of a regex match anchored to the end of a string.
Reference: https://github.com/fastruby/fast-ruby#stringmatch-vs-stringmatch-vs-stringstart_withstringend_with-code-start-code-end
SafeAutoCorrect: false
Enabled: false
SafeMultiline: true
VersionAdded: '0.36'
VersionChanged: '1.10'
Performance/FixedSize:
Description: Do not compute the size of statically sized objects except in constants.
Enabled: false
VersionAdded: '0.35'
# Supports --autocorrect
Performance/FlatMap:
Description: Use `Enumerable#flat_map` instead of `Enumerable#map...Array#flatten(1)`
or `Enumerable#collect..Array#flatten(1)`.
Reference: https://github.com/fastruby/fast-ruby#enumerablemaparrayflatten-vs-enumerableflat_map-code
Enabled: true
VersionAdded: '0.30'
EnabledForFlattenWithoutParams: false
# Supports --autocorrect
Performance/InefficientHashSearch:
Description: Use `key?` or `value?` instead of `keys.include?` or `values.include?`.
Reference: https://github.com/fastruby/fast-ruby#hashkey-instead-of-hashkeysinclude-code
Enabled: false
VersionAdded: '0.56'
Safe: false
# Supports --autocorrect
Performance/IoReadlines:
Description: Use `IO.each_line` (`IO#each_line`) instead of `IO.readlines` (`IO#readlines`).
Reference: https://docs.gitlab.com/ee/development/performance.html#reading-from-files-and-other-data-sources
Enabled: false
VersionAdded: '1.7'
# Supports --autocorrect
Performance/MapCompact:
Description: Use `filter_map` instead of `collection.map(&:do_something).compact`.
Enabled: false
SafeAutoCorrect: false
VersionAdded: '1.11'
Performance/MapMethodChain:
Description: Checks if the `map` method is used in a chain.
Enabled: false
Safe: false
VersionAdded: '1.19'
Performance/MethodObjectAsBlock:
Description: Use block explicitly instead of block-passing a method object.
Reference: https://github.com/fastruby/fast-ruby#normal-way-to-apply-method-vs-method-code
Enabled: false
VersionAdded: '1.9'
Performance/OpenStruct:
Description: Use `Struct` instead of `OpenStruct`.
Enabled: false
VersionAdded: '0.61'
Safe: false
# Supports --autocorrect
Performance/RangeInclude:
Description: Use `Range#cover?` instead of `Range#include?` (or `Range#member?`).
Reference: https://github.com/fastruby/fast-ruby#cover-vs-include-code
Enabled: false
VersionAdded: '0.36'
VersionChanged: '1.7'
Safe: false
# Supports --autocorrect
Performance/RedundantBlockCall:
Description: Use `yield` instead of `block.call`.
Reference: https://github.com/fastruby/fast-ruby#proccall-and-block-arguments-vs-yieldcode
Enabled: false
VersionAdded: '0.36'
# Supports --autocorrect
Performance/RedundantEqualityComparisonBlock:
Description: Checks for uses `Enumerable#all?`, `Enumerable#any?`, `Enumerable#one?`,
or `Enumerable#none?` are compared with `===` or similar methods in block.
Reference: https://github.com/rails/rails/pull/41363
Enabled: false
Safe: false
AllowRegexpMatch: true
VersionAdded: '1.10'
# Supports --autocorrect
Performance/RedundantMatch:
Description: Use `=~` instead of `String#match` or `Regexp#match` in a context where
the returned `MatchData` is not needed.
Enabled: false
VersionAdded: '0.36'
# Supports --autocorrect
Performance/RedundantMerge:
Description: Use Hash#[]=, rather than Hash#merge! with a single key-value pair.
Reference: https://github.com/fastruby/fast-ruby#hashmerge-vs-hash-code
Enabled: false
Safe: false
VersionAdded: '0.36'
VersionChanged: '1.11'
MaxKeyValuePairs: 2
# Supports --autocorrect
Performance/RedundantSortBlock:
Description: Use `sort` instead of `sort { |a, b| a <=> b }`.
Enabled: false
VersionAdded: '1.7'
# Supports --autocorrect
Performance/RedundantSplitRegexpArgument:
Description: Identifies places where `split` argument can be replaced from a deterministic
regexp to a string.
Enabled: false
VersionAdded: '1.10'
# Supports --autocorrect
Performance/RedundantStringChars:
Description: Checks for redundant `String#chars`.
Enabled: false
VersionAdded: '1.7'
# Supports --autocorrect
Performance/RegexpMatch:
Description: Use `match?` instead of `Regexp#match`, `String#match`, `Symbol#match`,
`Regexp#===`, or `=~` when `MatchData` is not used.
Reference: https://github.com/fastruby/fast-ruby#regexp-vs-regexpmatch-vs-regexpmatch-vs-stringmatch-vs-string-vs-stringmatch-code-
Enabled: false
VersionAdded: '0.47'
# Supports --autocorrect
Performance/ReverseEach:
Description: Use `reverse_each` instead of `reverse.each`.
Reference: https://github.com/fastruby/fast-ruby#enumerablereverseeach-vs-enumerablereverse_each-code
Enabled: false
VersionAdded: '0.30'
# Supports --autocorrect
Performance/ReverseFirst:
Description: Use `last(n).reverse` instead of `reverse.first(n)`.
Enabled: false
VersionAdded: '1.7'
Performance/SelectMap:
Description: Use `filter_map` instead of `ary.select(&:foo).map(&:bar)`.
Enabled: false
VersionAdded: '1.11'
# Supports --autocorrect
Performance/Size:
Description: Use `size` instead of `count` for counting the number of elements in
`Array` and `Hash`.
Reference: https://github.com/fastruby/fast-ruby#arraylength-vs-arraysize-vs-arraycount-code
Enabled: false
VersionAdded: '0.30'
# Supports --autocorrect
Performance/SortReverse:
Description: Use `sort.reverse` instead of `sort { |a, b| b <=> a }`.
Enabled: false
VersionAdded: '1.7'
# Supports --autocorrect
Performance/Squeeze:
Description: Use `squeeze('a')` instead of `gsub(/a+/, 'a')`.
Reference: https://github.com/fastruby/fast-ruby#remove-extra-spaces-or-other-contiguous-characters-code
Enabled: false
VersionAdded: '1.7'
# Supports --autocorrect
Performance/StartWith:
Description: Use `start_with?` instead of a regex match anchored to the beginning
of a string.
Reference: https://github.com/fastruby/fast-ruby#stringmatch-vs-stringmatch-vs-stringstart_withstringend_with-code-start-code-end
SafeAutoCorrect: false
Enabled: false
SafeMultiline: true
VersionAdded: '0.36'
VersionChanged: '1.10'
# Supports --autocorrect
Performance/StringIdentifierArgument:
Description: Use symbol identifier argument instead of string identifier argument.
Enabled: false
VersionAdded: '1.13'
# Supports --autocorrect
Performance/StringInclude:
Description: Use `String#include?` instead of a regex match with literal-only pattern.
Enabled: false
SafeAutoCorrect: false
VersionAdded: '1.7'
VersionChanged: '1.12'
# Supports --autocorrect
Performance/StringReplacement:
Description: Use `tr` instead of `gsub` when you are replacing the same number of
characters. Use `delete` instead of `gsub` when you are deleting characters.
Reference: https://github.com/fastruby/fast-ruby#stringgsub-vs-stringtr-code
Enabled: false
VersionAdded: '0.33'
# Supports --autocorrect
Performance/Sum:
Description: Use `sum` instead of a custom array summation.
SafeAutoCorrect: false
Reference: https://blog.bigbinary.com/2016/11/02/ruby-2-4-introduces-enumerable-sum.html
Enabled: false
VersionAdded: '1.8'
VersionChanged: '1.13'
OnlySumOrWithInitialValue: false
# Supports --autocorrect
Performance/TimesMap:
Description: Checks for .times.map calls.
Enabled: false
SafeAutoCorrect: false
VersionAdded: '0.36'
VersionChanged: '1.13'
# Supports --autocorrect
Performance/UnfreezeString:
Description: Use unary plus to get an unfrozen string literal.
Enabled: true
SafeAutoCorrect: false
VersionAdded: '0.50'
VersionChanged: '1.9'
# Supports --autocorrect
Performance/UriDefaultParser:
Description: Use `URI::DEFAULT_PARSER` instead of `URI::Parser.new`.
Enabled: false
VersionAdded: '0.50'