java - What's the best way to reduce latency on downstream in netty? -

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i'm using netty 5.0 , find out when downstream action initiated non-io thread, takes few hundreds microseconds io thread take task. below measurement code. measure time in 2 places, 1 in non-io thread , 1 in io thread (actually, in encoder outbound handler). in non-io thread, latency around 200 ~ 300 microseconds while in io thread, latency 50 ~ 100 nano seconds. there anyway reduce latency of context switching sub microseconds? 

channelfuture f = b.bind(); ... channelpromise cp = f.channel().newpromise(); long currentnano = system.nanotime(); cp.addlistener(() -> (system.out.println(system.nanotime() - currentnano)); cp.channel().writeandflush(obj);

i'm using disruptor pattern in other parts of codes , can object passing between threads below microsecond, want same in netty.


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