Forum OpenACS Development: Re: Build a web server (HTTPS) in 20 lines of code

Features

• High performance web server (HTTPS) written in C and Tcl.
• It uses a highly efficient event-driven model with fixed number of threads to manage connections.
• It can be easily extended.
• It is a TCL loadable module.
• It is the absolute minimum.
• It supports multiple certificates for different hosts (SNI).
• Keepalive connections
• Compression (gzip)

Benchmarks

Here are some benchmarks with and without keepalive:

With keepalive (example-best-with-native-threads.tcl - uses parse_conn/return_conn): 89 microseconds per request

# gohttpbench -v 10 -n 1000000 -c 10 -t 1000 -k "https://localhost:4433/example";
Document Path:          /example
Document Length:        251 bytes
Concurrency Level:      10
Time taken for tests:   8.88 seconds
Complete requests:      1000000
Failed requests:        0
HTML transferred:       251000000 bytes
Requests per second:    112609.68 [#/sec] (mean)
Time per request:       0.089 [ms] (mean)
Time per request:       0.009 [ms] (mean, across all concurrent requests)
HTML Transfer rate:     27602.55 [Kbytes/sec] received

Without keepalive (example-best-with-native-threads.tcl - uses parse_conn/return_conn): 1.6 millisecond per request

# gohttpbench -v 10 -n 1000000 -c 10 -t 1000 "https://localhost:4433/example";
Concurrency Level:      10
Time taken for tests:   155.66 seconds
Complete requests:      1000000
Failed requests:        0
HTML transferred:       246000000 bytes
Requests per second:    6424.29 [#/sec] (mean)
Time per request:       1.557 [ms] (mean)
Time per request:       0.156 [ms] (mean, across all concurrent requests)
HTML Transfer rate:     1543.33 [Kbytes/sec] received

PS. Not bad for a month's worth of work. I will fix any issues and improve it further. All feedback is welcome. Many thanks to Holger Ewert for the constructive feedback so far.