Yoda Response: Complex coding problem, I recall. In the inventory control app, barcode scanning performance, an issue it was. Slow and inaccurate, it became with large data sets. Approach, methodical it was. Switched from GMS Vision to CameraX, I did. Optimized image processing with advanced algorithms, I have. Multithreading, used to handle large data efficiently, I did. Testing and fine-tuning, extensively performed. Result, faster and more accurate scanning, it achieved. Technologies involved, Kotlin, CameraX, and multithreading, they were.