what's new about swift performance?

At WWDC 2024, several sessions highlighted the advancements in Swift performance. Here are the key points:

Swift Optimizer:
- Swift has a powerful optimizer that eliminates many performance issues automatically. However, the way you write code can significantly impact the optimizer's effectiveness. Regular performance monitoring and automated measurements are recommended to identify and address performance hotspots (Explore Swift performance).
Swift 6 Enhancements:
- Data Race Safety: Swift 6 introduces a new language mode that provides data race safety guarantees, helping you write correct concurrent programs (What’s new in Swift).
- Concurrency Improvements: Swift 6 includes complete concurrency checking and improvements to data race checking, ensuring safety when passing non-sendable values across isolation boundaries (What’s new in Swift).
- Non-Copyable Types: Swift 6 introduces non-copyable types, which can help optimize memory usage and performance (What’s new in Swift).
Swift's Evolution:
- Swift continues to evolve as a compelling choice for performance-sensitive and secure code. The language's safety, speed, and approachability, combined with built-in C and C++ interoperability, make it a strong successor to C (Platforms State of the Union).
New Testing Framework:
- An all-new testing framework named Swift Testing has been introduced, which features expressive APIs that simplify writing tests, further contributing to the overall performance and maintainability of Swift code (Platforms State of the Union).

These sessions provide a comprehensive overview of the new features and improvements in Swift performance.