What methods are used to determine the causes of low software performance?

To identify performance issues in iOS applications, the following methods and tools are commonly used:

• Profiling with Instruments: allows analyzing CPU usage, memory, response time, memory leaks, etc.
• Time Profiler: helps identify bottlenecks in code that take a lot of execution time.
• Allocations and Leaks: for detecting memory leaks and excessive memory consumption.
• Network Instruments: for analyzing network requests and their timing.
• FPS and GPU metrics: for assessing graphics performance and interface smoothness.

In addition to tools, it is important to:

• Analyze algorithms and data structures.
• Optimize heavy operations, such as performing tasks asynchronously.
• Use caching and lazy loading.

For example, if the app slows down when loading a list, Instruments can help determine whether the delay is due to data loading, cell rendering, or something else.