An extension of RuboCop focused on code performance checks.
Performance/ChainArrayAllocation when using select with block argument after select. (@koic)Performance/RedundantBlockCall when using block.call with block argument. (@koic)Performance/Casecmp cop by default. (@parkerfinch)Performance/StringIdentifierArgument when using string interpolation with methods that don't support symbols with :: inside them. (@earlopain)Performance/MapMethodChain when using map method chain without receiver. (@koic)Performance/StringIdentifierArgument when using string interpolation. (@earlopain)Performance/Count, Performance/FixedSize, Performance/FlatMap, Performance/InefficientHashSearch, Performance/RangeInclude, Performance/RedundantSortBlock, Performance/ReverseFirst, Performance/SelectMap, Performance/Size, Performance/SortReverse, and Performance/TimesMap cops aware of safe navigation operator. (@koic)Performance/ReverseEach when safe navigation is between reverse and each. (@fatkodima)Performance/Sum aware of safe navigation operator. (@koic)Performance/MapCompact to handle more safe navigation calls. (@fatkodima)Performance/StringInclude to handle === method. (@fatkodima)Performance/BlockGivenWithExplicitBlock when using Lint/UnusedMethodArgument's autocorrection together. (@ymap)Performance/RedundantMatch when expressions with lower precedence than =~ are used as an argument. (@ymap)Performance/ArraySemiInfiniteRangeSlice when using [] with string literals. (@koic)Performance/UnfreezeString. (@tagliala)Performance/MapMethodChain cop. (@koic)Performance/ArraySemiInfiniteRangeSlice, Performance/DeletePrefix, Performance/DeleteSuffix, Performance/Detect, Performance/EndWith, Performance/InefficientHashSearch, Performance/MapCompact, Performance/RedundantSplitRegexpArgument, Performance/ReverseEach, Performance/ReverseFirst, Performance/SelectMap, Performance/Squeeze, Performance/StartWith, Performance/StringInclude, and Performance/StringReplacement cops. (@koic)Performance/RedundantEqualityComparisonBlock when the block variable is used on both sides of ==. (@koic)Performance/ConstantRegexp and Performance/RegexpMatch when autocorrecting both at the same time. (@fatkodima)sort! and minmax to Performance/CompareWithBlock. (@vlad-pisanov)Performance/StringIdentifierArgument when using a command method with receiver. (@koic)Performance/FlatMap autocorrection for chained methods on separate lines. (@fatkodima)Performance/StringInclude. (@fatkodima)