Following the same strategy as Websocket described in
commit cbed21c383e4cebb7df5a0a8b81f18c1738bef3e
Gains are comparable as far as Websocket over HTTP/2
is concerned.
`perf` has shown that Cowboy spends a lot of time
cancelling and starting this timer. Instead of resetting
for every data received, we now only reset a field in the
state.
Before it was working like this:
- start idle timeout timer
- on trigger, close the connection
- on data, cancel and start again
Now it's working like this:
- start idle timeout timer for a tenth of its duration, with tick number = 0
- on trigger, if tick number != 10
- start the timer again, again for a tenth of its duration
- increment tick number
- on trigger, if tick number = 10
- close the connection
- on data, set tick number to 0
It benchmarks binary, ascii, mixed and japanese data
using Websocket and Websocket over HTTP/2.
HTTP/2 options get set to ensure that performance is
better than the default HTTP/2 options.
It switches to Gun and Ranch branches that include
fixes that are required for tests to complete successfully.
