Make SwiftData Searches Fast With #Index And #Unique

This article explains how to optimize SwiftData models for production use by leveraging the #Index and #Unique schema macros introduced in iOS 18. It covers creating binary and compound indexes to accelerate common fetch queries, such as filtering by folder and sorting by date, and using #Unique to enforce uniqueness constraints on properties or combinations of properties. The guide includes a practical example with a Note model, demonstrating how to add indexes that match real query patterns and handle schema changes safely. Targeted at iOS/macOS developers using SwiftData, it provides best practices for improving fetch performance and data integrity.