kkbox wwdc17 swift and foundation - liyao
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WWDC17 讀書會Swift & Foundation
Liyao Chen1現在 2017.6.30
Swift & Foundation• What’s New in Swift
• What’s New in Foundation
• Efficient Interactions with Frameworks
• Modernizing Grand Central Dispatch Usage
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Outlines
• 無痛升級
• New APIs
• Performance
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無痛升級
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無痛升級
• Swift Refactoring Support
• New Build System
• Copy on Write
• Exclusive Access to Memory
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New Build System
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New Build System
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• Shard Build for Coverage Testing
• Indexing While Building
• Faster Generic Code
• Heap alloc -> Stack alloc
New Build System
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Copy on Write
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• Make it easier to reason about local variables
• Enable better programmer optimization
• Enable better compiler optimization
• Enable powerful new language features
Exclusive Access to Memory
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Exclusive Access to Memory
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Exclusive Access to Memory
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New APIs
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New APIs• Private function access control changed
• Class and Subtype Existential
• KeyPaths and KVO
• Encoding & Decoding
• Generics
• String
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Key Paths and KVO
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Encoding and Decoding
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–Mantle, SwiftyJSON
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String
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Performance
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Performance
• Memory
• Smaller Binaries
• CPU
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Memory
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Text layout and rendering
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Text layout and rendering
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Text layout and rendering
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Text layout and rendering
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Smaller Binaries
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CPU
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GCD
• Parallelism
• Concurrency
• Context switching
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What Are Dispatch Sources
• In short, a dispatch source is an object which monitors for some type of event.
• When the event occurs, it automatically schedules a block for execution on a dispatch queue.
• https://www.mikeash.com/pyblog/friday-qa-2009-09-11-intro-to-grand-central-dispatch-part-iii-dispatch-sources.html
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What Are Dispatch Sources
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Custom event
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Recap
• 無痛升級
• New APIs
• Performance
• Binary size, memory, CPU
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Q and A
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Liyao Chen現在
Swift & Foundation2017.6.30
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