Hello World, req/s and logging

[adrianboston]

Excellent server. The configuration is a good feature that no other seem to have.

But, comparing Hello World in each server

Hyper is pushing ~46840 req/s, 5900 kbyte/s req/s
Warp based on Hyper is ~54666 req/s, 6886 kbyte/s
Actix is ~36869 req/s, 3168 kbyte/s
Rocket is doing about ~15459 req/s, 3744 kbyte/s

IMHO, the logging is slowing it down a lot -- even when turned to a low level. The above is set to log level: critical so no actual printout was seen.

I have not done a significant analysis on the Rocket code but allow me to put it into your ear. From previous experience with C++ Boost logging that also had levels, it seemed that strings are formatted, constructed, etc but the final printout is not conducted. A macro prevented those steps and it made a significant difference.

When set to >> log level: normal req/s is even lower.
5785 req/s, 1401 kbyte/s

Here is the configuration for the initial

🔧 Configured for release.
   >> address: 127.0.0.1
   >> port: 8000
   >> workers: 32
   >> ident: Rocket
   >> keep-alive: 5s
   >> limits: bytes = 8KiB, data-form = 2MiB, file = 1MiB, form = 32KiB, json = 1MiB, msgpack = 1MiB, string = 8KiB
   >> tls: disabled
   >> temp dir: /var/folders/kg/bdpyk6mj09dd0cjvffdw1clh0000gn/T/
   >> log level: critical
   >> cli colors: true
   >> shutdown: ctrlc = true, force = true, signals = [SIGTERM], grace = 2s, mercy = 3s