https://stressgrid.com/blog/100k_cps_with_elixir/
What it's not good at is numerical computation.
As for the others I have no clue but I am sure jvm won't be as low latency as Elixir's VM since it's not a preemptive scheduler.
There's a JVM vs BEAM VM comparison paper (http://ds.cs.ut.ee/courses/course-files/To303nis%20Pool%20.p...).
I believe section 2.2. ERTS of the paper talk about BEAM VM advantage for low latency.
> The per process heap architecture has manybenefits, one of which is that because each pro-cess has it’s own heap and there are presum-ably numerous process’s,...
update:
Ah... I think the relevant part is in 3.3 Lightweight threads.
> 3.3. Lightweight threads
> The effect is that Erlang is one of a fewlanguages that actually does preemptive mul-titasking. The reduction count of 2000, whichis sub 1ms, is quite low and forces many smallcontext switches between the Erlang processes.