NonBlockingLoadTest.java

WebClient client = WebClient.builder()
      .baseUrl("http://" + args[0])
      .build();

Flux
  .generate(AtomicLong::new, (state, sink) -> {
    long i = state.getAndIncrement();
    sink.next(i);
    return state;
  })
  .limitRate(1)
  .flatMap(n -> client.get().uri("/MYENDPOINT").exchange())
  .doOnNext(resp -> {
    if (resp.statusCode().is2xxSuccessful())
      counter.increment();
  })
  .blockLast();

Disclaimer: Gatling author here

Hi,

• indeed, Gatling uses a non blocking architecture, not a one-thread-per-virtual-user one + blocking IO.
• what you're doing is only realistic wrt server to server traffic where you share one global connection pool and SSLContext. If you want to simulate web traffic realistically, each virtual user must have its own connections and SSLSessions.

Regards