Same backend, same database, same k6. In the first runs it looked like Embedded GlassFish was on top. When I fixed JDK, warmup, window, heap, and DB attribution, the story changed: Spring Boot ended up with the best local profile for this workload. Payara Micro was the cleanest Jakarta EE by check failures. GlassFish surprised by being viable.

Mismo backend, misma base, mismo k6. En las primeras corridas parecía que Embedded GlassFish mandaba. Cuando ajusté JDK, warmup, ventana, heap y atribución de DB, la historia…

Same backend, same database, same k6. In the first runs it looked like Embedded GlassFish was on top. When I fixed JDK, warmup, window, heap, and DB attribution, the story…