Grand Central Dispatch
Apple's low-level concurrency framework for managing parallel tasks on Apple platforms. GCD provides a systematic approach to executing code asynchronously through dispatch queues, enabling efficient utilization of multi-core processors.
iOS development with background processing requirements
Async operations in iOS applications at CatchSmart
Sophisticated tiered queue architecture at Axle Media
✨ Built multi-tier concurrent processing system with QoS management, thermal monitoring, and resource contention handling
Core Concepts
- • Dispatch queues - Serial and concurrent queue management
- • Quality of Service (QoS) - Task priority management
- • Dispatch groups - Synchronizing multiple async operations
- • Dispatch semaphores - Resource access control
Advanced Topics
- • Tiered queue architecture
- • Thermal state monitoring
- • Resource contention management
- • Dispatch source for system events
- • Barrier blocks for read-write synchronization
Tools & Ecosystem
Key Achievements
- ✓Built sophisticated multi-tier queue architecture
- ✓Implemented thermal monitoring for sustained performance
- ✓Designed resource contention management system
Metrics
- 📊 Multi-core parallel processing for media files
- 📊 Sustained high-throughput processing
Enterprise media management platform rebuilt from web to native macOS with 15-20x performance gains serving NBC, CNN, BBC
Native iOS marketplace enabling users to browse local shops, place orders online, and pick up in-store with smart offline caching
- 💬Experience designing complex concurrent architectures
- 💬Understanding of system resource management
- 💬Production experience with high-throughput processing