HTTP frameworks benchmark focused on D libraries

[tchaloupka]

On Monday, 28 September 2020 at 09:44:14 UTC, Daniel Kozak wrote:
> I do not see TCP_NODELAY anywhere in your code for raw tests, 
> so maybe you should try that

I've added new results with these changes:

* added NGINX test
* edge and level triggered variants for epoll tests (level should 
be faster in this particular test)
* new hybrid server variant of ARSD (thanks Adam)
* added TCP_NODELAY to listen socket in some tests (client 
sockets should derive this)
* make response sizes even for all tests
* errors and response size columns are printed out only when 
there's some difference as they are pretty meaningless otherwise
* switch to wrk load generator as a default (hey is still 
supported) - as it is less resource demanding and gives better 
control over client connections and it's worker threads

Some tests insights:

* arsd - I'm more inclined to switch it to multiCore category, at 
least the hybrid variant now (as it's not too fair against the 
others that should run just one worker with one thread event 
loop) - see https://github.com/tchaloupka/httpbench/pull/5 for 
discussion
   * ideal would be to add current variant to multiCore tests and 
limited variant to singleCore
* photon - I've assumed that it's working in a single thread, but 
it doesn't seems to (see 
https://github.com/tchaloupka/httpbench/issues/7)