Java: Thread-Per-Request Bottleneck

WebFlux uses non-blocking I/O, Virtual Threads use lightweight threads.

WebFlux leverages non-blocking I/O to handle many connections with fewer resources, ideal for high concurrency scenarios. Virtual Threads, on the other hand, allow a large number of lightweight threads, which can simplify blocking code but may not scale as well as non-blocking I/O in certain cases. For instance, an e-commerce server with WebFlux efficiently manages numerous live price streams using event loops, whereas Virtual Threads might struggle with high concurrency due to context switching overhead.