HTTPCORE-484

[King Silver <si...@gmail.com>]

@ Oleg：
      I think if   read or write event  concurrently with a timeout
event,there will be an exception in read or write event .handleIOEvent
method in InternalChannel class can
handle the exception appropriate。
    perhaps what i think is not right,please point it out,and i can try to
improve the code.

Performance analysis; Re: HTTPCORE-484

[Oleg Kalnichevski <ol...@apache.org>]

On Tue, 2018-07-17 at 19:39 +0800, King Silver wrote:
> @ Oleg：
>       I think if   read or write event  concurrently with a timeout
> event,there will be an exception in read or write event 

But this is bad. We do not want to shut down a channel only because
some operation times out. 


> .handleIOEvent
> method in InternalChannel class can
> handle the exception appropriate。
>     perhaps what i think is not right,please point it out,and i can
> try to
> improve the code.

Before we can make any sensible decision about this feature I would
like to know its impact on performance of the I/O reactor code. 

While working performance optimization of HttpCore 4.3 I put together a
*non-scientific* benchmark that nevertheless measures i/o throughput of
HttpCore, Jetty and Netty under similar load scenarios that can serve
as a base line for comparative analysis of HttpCore performance. 

https://github.com/ok2c/httpcore-benchmark  

If you want to make a major contribution to the project please consider
forking the benchmark code, upgrading it to the latest releases of all
3 frameworks and adding HttpCore 5 as the forth implementation.

Once there are some numbers we can compare with, we can try running the
latest HttpCore with your changes and see what kind of impact that
makes on the benchmark results.

Oleg 

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