JDK 17 delivers runtime and GC optimizations that significantly boost microservices performance without code changes, making it ideal for high-throughput banking APIs and Spring Boot deployments.

Production-Ready ZGC & Shenandoah

JDK 17 stabilizes ZGC and Shenandoah as production GCs, achieving sub-10ms pause times on multi-GB heaps—up to 20x better than G1 in JDK 11 for latency-sensitive services.
These enable consistent p99 latencies under load, perfect for real-time fraud detection or API gateways handling 10k+ reqs/sec.

Enhanced G1 GC

G1 improvements yield 10-20% throughput gains and shorter pauses via better string deduplication and compressed class pointers, saving 100s of MBs in memory-heavy apps.
Real-world: Reduces EC2 instances needed by 20-30% (e.g., 10 → 7-8) for equivalent throughput vs. JDK 8/11.​

Epsilon GC for Short-Lived Tasks

No-op GC for serverless/microservices with predictable lifecycles, eliminating GC overhead entirely for 20-40% faster execution in short bursts.

CDS and Faster Startup

Class Data Sharing cuts startup by 30-40% and RSS by 5-15%, accelerating Kubernetes pod scaling for Spring Boot services.