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Memory Management
7 min readJan 29, 2025
- What tools in Xcode help debug memory leaks or optimize memory usage?
1. Instruments — Leaks and Allocations
📌 How to Use?
- Open Xcode → Product → Profile (or
Cmd + I
). - Select Leaks or Allocations and start profiling your app.
🔹 Leaks Instrument
- Detects memory leaks (objects that are not deallocated).
- Highlights leaked objects in red and shows their allocation stack trace.
🔹 Allocations Instrument
- Tracks memory usage by showing:
- Objects allocated and their sizes.
- Retain count changes (useful for debugging retain cycles).
- Heap memory growth over time.
✅ Use Case:
- Detect retain cycles caused by strong references in closures or delegates.
- Identify excessive memory allocations.
Problem with UITableViewCell Creation: The issue stems from creating a new UITableViewCell
each time it's needed, leading to excessive memory allocations. This is inefficient because cells are being created and destroyed frequently when scrolling.
- Solution: Reusing Cells…