The Virtual Threads Revolution
Spring Boot 3.3 fully supports Java 21 virtual threads. Simply enabling spring.threads.virtual.enabled=true replaces traditional platform threads with lightweight virtual threads. In high-concurrency scenarios, virtual threads can improve throughput by 3-5x.
GraalVM Native Compilation
With GraalVM Native Image, Spring Boot applications can be compiled to native executables, reducing startup time from seconds to milliseconds and memory usage by 70%. Ideal for Serverless and containerized deployments.
Performance Tuning Checklist
Connection pool optimization (HikariCP tuning), response compression (Gzip/Brotli), caching strategies (Spring Cache + Caffeine), database query optimization (index analysis, N+1 problem resolution).
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