Spring Boot API Aggregation: Sequential, CompletableFuture, and Virtual Thread Structured Concurrency Performance
The article benchmarks three Spring Boot aggregation approaches—sequential calls, CompletableFuture parallelism, and virtual‑thread structured concurrency—using JMeter on a Spring Boot 3.5.0 service, showing that CompletableFuture delivers the lowest latency, structured concurrency offers better reliability, and sequential execution performs the worst.
