Mastering Swift 2 Programming (Video 47)

The video explores how dynamic dispatch in Swift affects code performance, highlighting the trade-offs between flexibility and runtime overhead. It introduces the final keyword as a means to optimize performance by allowing direct calls and compiler optimizations. The video demonstrates these concepts using a Game of Life application, showing significant performance improvements through testing. It concludes by encouraging viewers to apply these techniques to older applications and previews the next topic on reference types and performance.

What is the main tradeoff of using dynamic dispatch in Swift?

• Increased code flexibility

• Reduced code readability

• Runtime overhead and slower performance

• Increased memory usage

How does the 'final' keyword improve performance in Swift?

• By allowing multiple inheritance

• By enabling method and property overrides

• By restricting overrides and allowing direct calls

• By increasing memory allocation

What was the performance improvement observed after using the 'final' keyword in the game application?

• A 5% increase in CPU usage

• No noticeable change

• A 20% decrease in memory usage

• A 10% performance boost

What tool was used to measure the performance improvements in the application?

• Memory Profiler

• Time Profiler

• Network Profiler

• Disk Profiler

What is encouraged at the end of the video regarding older applications?

• To increase their memory usage

• To remove all dynamic dispatch

• To apply the discussed optimization techniques

• To rewrite them in a new language