vibe.d + dpq2 + json trick

[Denis Feklushkin]

On Wednesday, 27 August 2025 at 12:54:37 UTC, Andrea Fontana 
wrote:

>> ab is old and single threaded, use wrk it’s multithreaded and 
>> supports lua scripts to generate requests.
>
> I agree. Try with wrk, wrk2, bombardier...

I used `wrk` for the first time
Results matched the `ab` tool (~540 RPS):
```
$ wrk -t 10 -c 20 -d 5 http://localhost:8080/oldschool
Running 5s test @ http://localhost:8080/oldschool
   10 threads and 20 connections
   Thread Stats   Avg      Stdev     Max   +/- Stdev
     Latency    37.66ms   13.67ms  77.06ms   72.25%
     Req/Sec    52.86     17.26    80.00     74.80%
   2643 requests in 5.01s, 601.56KB read
   Socket errors: connect 0, read 2643, write 0, timeout 0
   Non-2xx or 3xx responses: 2643
Requests/sec:    527.93
Transfer/sec:    120.16KB

$ wrk -t 10 -c 20 -d 5 http://localhost:8080/normal
Running 5s test @ http://localhost:8080/normal
   10 threads and 20 connections
   Thread Stats   Avg      Stdev     Max   +/- Stdev
     Latency    35.98ms   13.80ms  75.36ms   72.60%
     Req/Sec    55.36     22.38   280.00     70.12%
   2779 requests in 5.10s, 632.51KB read
   Socket errors: connect 0, read 2779, write 0, timeout 0
   Non-2xx or 3xx responses: 2779
Requests/sec:    544.88
Transfer/sec:    124.02KB

$ wrk -t 10 -c 20 -d 5 http://localhost:8080/special
Running 5s test @ http://localhost:8080/special
   10 threads and 20 connections
   Thread Stats   Avg      Stdev     Max   +/- Stdev
     Latency    36.85ms   13.50ms  76.97ms   72.86%
     Req/Sec    53.91     17.20   101.00     74.10%
   2706 requests in 5.10s, 615.90KB read
   Socket errors: connect 0, read 2706, write 0, timeout 0
   Non-2xx or 3xx responses: 2706
Requests/sec:    530.60
Transfer/sec:    120.77KB
```