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Idev.d

Posted on Originally published at idev.my

Spring Boot 3.3: Best Practices for High-Performance RESTful APIs

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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