<ul><li>The Swift community has seen success with Codable, but there is a need for improved performance during serialization and deserialization.</li><li>Existing Codable APIs incur performance penalties due to design choices, such as additional runtime and memory costs.</li><li>Developers often face challenges when customizing CodingKey representations in Swift.</li><li>The new design aims to use Swift's macro features to enhance customization and performance.</li><li>There is a suggestion to encourage format-specific coders like JSONCodable for better functionality.</li><li>The design introduces format-agnostic protocols alongside format-specialized ones to handle owned types.</li><li>There is a proposal to separate the API to support general serialization and specific format support separately.</li><li>One common use case missing from Codable is heterogeneous/dynamic decoding and encoding.</li><li>Codable lacks support for encoding and decoding cyclical object graphs and runtime type information.</li><li>Improvements in error handling and addressing serialization challenges are requested by the community.</li></ul>

The Future of Swift Serialization and Deserialization APIs

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