This is not a rigourous benchmark; I did not use the TechEmpower framework for building my test, nor did I build a version of dash for TechEmpower:
Comparing a 100 line C program to hundreds or thousands of lines of go or C or Java is a bit pointless. If the 100 lines of C doesn't do what you want, you'll throw it away and write a different 100 lines. That's the point of small programs.
The only reason I chose fasthttp instead of ulib because I could not get ulib to build on my machine.
I built the fasthttp test program by by checking out https://github.com/TechEmpower/FrameworkBenchmarks.git,
and disabling the mysql connection, then running frameworks/Go/fasthttp's ./server-mysql
Here's fasthttp running on my machine (best of three):
$ wrk -t2 -c90 -d9s http://localhost:8080/plaintext
Running 9s test @ http://localhost:8080/plaintext
2 threads and 90 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 831.78us 364.48us 7.56ms 70.19%
Req/Sec 40.55k 3.31k 48.04k 74.44%
726417 requests in 9.01s, 87.98MB read
Requests/sec: 80603.64
Transfer/sec: 9.76MB
and here's dash running with the kdb networking disabled (best of three):
$ wrk -t2 -c90 -d3s 'http://127.0.0.1:8080/?f=204&k=hi&v=1'
Running 3s test @ http://127.0.0.1:8080/?f=204&k=hi&v=1
2 threads and 90 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 787.72us 213.62us 3.49ms 71.85%
Req/Sec 44.82k 3.04k 60.44k 83.61%
271946 requests in 3.10s, 16.08MB read
Requests/sec: 87671.23
Transfer/sec: 5.18MB