Hi, I was doing some benchmarks with gatling and came across very strange results where if I have a REST endpoint with normal result types I get 1200 requests per second, but if I return those results inside RxJava's Single (with Single.just()) I get about 250 requests per second, and if I change that with CompletionStage (using CompletableFuture.completedFuture()) I get about 310 requests per second. Frankly I'm not sure how to go about finding out why we have such a difference, and whether we can mitigate it, but we should definitely try. How do you usually tackle these problems? Any help? Thanks, cheers.

If the benchmark is accessible somewhere, I can take a look at why there is throughput degradation. Thanks John On Sat, Oct 20, 2018 at 3:22 PM Alessio Soldano <asoldano(a)redhat.com&gt; wrote: > Hi Stephane, > I think we should definitely profile this. Can you share a bit more > details/reproducer? > In the past we've also relied on the internal performance team to get jfr > recordings under proper load in a suitable bench environment. > Cheers > > On Thursday, October 18, 2018, Stephane Epardaud <stef(a)epardaud.fr&gt; > wrote: > >> Hi, >> >> I was doing some benchmarks with gatling and came across very strange >> results where if I have a REST endpoint with normal result types I get 1200 >> requests per second, but if I return those results inside RxJava's Single >> (with Single.just()) I get about 250 requests per second, and if I change >> that with CompletionStage (using CompletableFuture.completedFuture()) I get >> about 310 requests per second. >> >> Frankly I'm not sure how to go about finding out why we have such a >> difference, and whether we can mitigate it, but we should definitely try. >> How do you usually tackle these problems? Any help? >> >> Thanks, cheers. >> > > > -- > > Alessio Soldano > > Associate Manager > > Red Hat > > <https://www.redhat.com> > <https://red.ht/sig> > > _______________________________________________ > resteasy-dev mailing list > resteasy-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/resteasy-dev > -- JOHN O'HARA PRINCIPAL SOFTWARE ENGINEER Red Hat <https://www.redhat.com/> <https://red.ht/sig> TRIED. TESTED. TRUSTED. <https://redhat.com/trusted> @redhat <https://twitter.com/redhat> @redhatinc <https://instagram.com/redhatinc> @redhatsnaps <https://snapchat.com/add/redhatsnaps>