Bug fixes

• #517: Fix false positives for Performance/RedundantStringChars when using str.chars[0, 2]. (@koic)

Changes

• #520: Disable Performance/BigDecimalWithNumericArgument by default. (@earlopain)

Bug fixes

• #444: Fix an incorrect autocorrect for Performance/BlockGivenWithExplicitBlock when using Naming/BlockForwarding's autocorrection together. (@a-lavis)
• #500: Mark Performance/MapCompact cop as unsafe. (@jbpextra)
• #498: Fix Performance/Count cop error on empty selector block. (@viralpraxis)
• #504: Fix autocorrection syntax error for Performance/Count with multiline calls. (@lovro-bikic)

Changes

• #512: Detect negated conditions like !foo.start_with('bar') && !foo.start_with('baz') with Performance/DoubleStartEndWith. (@earlopain)

New features

• #496: Support it block parameter in Performance cops. (@koic)

Bug fixes

• #494: Fix Performance/FixedSize false positive when count is called with a numblock. (@dvandersluis)
• #492: Fix false positives for Performance/StringIdentifierArgument when using interpolated string argument. (@koic)

Changes

• #482: Change Performance/CollectionLiteralInLoop to not register offenses for Array#include? that are optimized directly in Ruby. (@earlopain)

New features

• #490: Pluginfy RuboCop Performance. (@koic)
• #462: Add new Performance/ZipWithoutBlock cop that checks patterns like .map { |id| [id] } or .map { [_1] } and can replace them with .zip. (@corsonknowles)

Bug fixes

• #484: Fix Performance/CaseWhenSplat cop error on when node without body. (@viralpraxis)

Bug fixes

• #478: Fix Performance/RedundantStringChars cop error in case of implicit receiver. (@viralpraxis)
• #480: Fix Performance/Squeeze cop error on frozen AST string node value. (@viralpraxis)

New features

• #474: Add new Performance/StringBytesize cop. (@viralpraxis)

Bug fixes

• #468: Fix false positives for Performance/BigDecimalWithNumericArgument when using float argument for BigDecimal. (@koic)

Bug fixes

• #454: Fix false positives for Performance/BigDecimalWithNumericArgument when using BigDecimal 3.1+. (@koic)

Changes

• #385: Disable Performance/BlockGivenWithExplicitBlock by default. (@earlopain)
• #407: Make Performance/DoubleStartEndWith aware of safe navigation. (@earlopain)

Bug fixes

• #452: Fix an error for Performance/RedundantEqualityComparisonBlock when the block is empty. (@earlopain)

New features

• #446: Support Prism as a Ruby parser (experimental). (@koic)

Bug fixes

• #437: Fix a false positive for Performance/ChainArrayAllocation when using select with block argument after select. (@koic)
• #448: Fix a false positive for Performance/RedundantBlockCall when using block.call with block argument. (@koic)

Changes

• #240: Disable Performance/Casecmp cop by default. (@parkerfinch)