How should i detect memory issues

To detect memory issues in your app, you can follow several steps and use various tools provided by Xcode, as discussed in the Analyze heap memory session at WWDC 2024. Here are the key points:

Enable Malloc Stack Logging: This can be done in the scheme diagnostics tab in Xcode. It helps track memory usage by providing backtraces for each allocation.
Use Xcode's Memory Report: This report shows an application's footprint over time, which includes more than just heap memory. It can help identify large memory issues and some recent history.
Memory Graph Debugger: This tool captures memory graphs, which are snapshots of all allocations and the references between them. It is accessible from Xcode's debug bar and is useful for focusing on specific allocations.
Command Line Tools: Xcode includes powerful command line tools like leaks, Heap, VMMap, and Malloc history for memory analysis. These tools can analyze macOS and simulator processes directly or investigate issues using already captured memory graphs.
Instruments Application: The allocations instrument records the history of all allocation and free events over time, aggregating statistics and call trees to help track these back to your code. The leaks instrument takes periodic snapshots of your app's memory to detect memory leaks.
Diagnosing Transient Memory Growth: Look for memory spikes in your app, which can cause memory pressure and system reactions like swapping and compressing dirty memory. Use the allocations instrument to find the allocations created and still living from the low point to the high point of a spike.
Understanding and Fixing Leaked Memory: Ensure all memory in your program is reachable through non-weak references. Identify and fix leaks by using the memory graph debugger to find and resolve reference cycles or accidental references.

For more detailed steps and examples, you can refer to the specific chapters in the session:

By following these guidelines and utilizing the tools provided, you can effectively detect and resolve memory issues in your app.