Lifecycle Optimization: Removing Redundant Calculations in onAppear for Improved Performance in SwiftUI

A micro-optimization was implemented by removing redundant calculations in the onAppear lifecycle method of a SwiftUI view. The initialization of the selectedEmoji property was moved to its declaration, ensuring a default value without requiring repeated computation. This change reduced CPU usage by approximately 25%, improving performance and responsiveness, especially on the Main Thread, while also simplifying the code for better maintainability.

Before MO

Before the micro-optimization, the SwiftUI view exhibited a total CPU usage of 264 ms, with 222 ms (84.1%) of the load concentrated on the Main Thread. Redundant calculations in the onAppear lifecycle method contributed to this overhead, leading to unnecessary resource consumption and slightly slower responsiveness during view rendering and updates. 

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After MO

After the micro-optimization, the total CPU usage decreased to 198 ms, with the Main Thread consuming 176 ms (88.9%). By removing redundant calculations from the onAppear lifecycle method and initializing the selectedEmoji property directly, the CPU load was reduced by approximately 25%, resulting in improved performance and a more responsive user interface. The optimization also streamlined the code, making it more efficient and maintainable. Despues de la micro

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