![]() Strings are now 16 bytes instead of 24 bytes.Improvements to compile-time performance.You can download Swift 4.2 by downloading the Xcode 10.0 IDE from Apple. ![]() New Swift package manager capabilities, including support for batch mode, with targets now compiled using this mode improved scheme generation logic and automatic Xcode project generation.The compiler directive that is syntactically equivalent to the #if swift version check but checks against the version of the compiler, regardless of which compatibility mode is running.Various bug fixes, such as for inheritance of generic initializers.Deflection arguments inlined at call sites.A change in the calling convention for the retain/release cycle, to reduce code size and improve performance. ![]() Batch-mode compilation support, which improves build times. ![]()
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