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@ -91,5 +91,77 @@ server {
}
```
## Benchmark
I used [k6.io](https://k6.io/) for benchmarking the read-by-id HTTP endoint. Details:
* CPU: Intel(R) Core(TM) i7-8650U CPU @ 1.90GHz (4 CPUs, 8 threads = 16 rocket workers)
* Mem: 24 GiB
* Storage: NVMe SSD Controller SM981/PM981/PM983
* both client (k6) and server (pastebin) running on the same machine
### Setup
```
$ cargo run --release
$ echo "Hello world" | curl -q -L -d @- -o - http://localhost:8000/
http://localhost:8000/0FWc4aaZXzf6GZBsuW4nv
$ cat > script.js <<EOL
import http from "k6/http";
export default function() {
let response = http.get("http://localhost:8000/<ID>");
};
EOL
$ docker pull loadimpact/k6
```
### Test 1: 5 concurrent clients, duration: 15s
```
$ docker run --network=host -i loadimpact/k6 run --vus 5 -d 15s - <script.js
data_received..............: 206 MB 14 MB/s
data_sent..................: 1.6 MB 108 kB/s
http_req_blocked...........: avg=203.98µs min=59.63µs med=97.34µs max=280.74ms p(90)=142.01µs p(95)=161.72µs
http_req_connecting........: avg=60.48µs min=0s med=54.22µs max=9.57ms p(90)=79.67µs p(95)=93.6µs
http_req_duration..........: avg=4.75ms min=2.87ms med=4.66ms max=27.25ms p(90)=6.02ms p(95)=6.59ms
http_req_receiving.........: avg=69.16µs min=18.54µs med=59µs max=12.94ms p(90)=103µs p(95)=128.14µs
http_req_sending...........: avg=53.21µs min=18.11µs med=33.01µs max=5.82ms p(90)=62.68µs p(95)=166.06µs
http_req_tls_handshaking...: avg=0s min=0s med=0s max=0s p(90)=0s p(95)=0s
http_req_waiting...........: avg=4.62ms min=2.8ms med=4.54ms max=20.25ms p(90)=5.87ms p(95)=6.36ms
http_reqs..................: 14986 999.062363/s
iteration_duration.........: avg=4.98ms min=2.96ms med=4.8ms max=299.92ms p(90)=6.18ms p(95)=6.77ms
iterations.................: 14986 999.062363/s
vus........................: 5 min=5 max=5
vus_max....................: 5 min=5 max=5
```
### Test 2: Every 15s double concurrent clients
```
docker run --network=host -i loadimpact/k6 run --vus 2 --stage 15s:4,15s:8,15s:16,15s:32 - <script.js
data_received..............: 654 MB 11 MB/s
data_sent..................: 5.9 MB 98 kB/s
http_req_blocked...........: avg=175.61µs min=56.88µs med=133.4µs max=168.74ms p(90)=175.38µs p(95)=219.87µs
http_req_connecting........: avg=86.58µs min=0s med=67.93µs max=34.36ms p(90)=95.52µs p(95)=116.89µs
http_req_duration..........: avg=13.29ms min=2.64ms med=8.3ms max=129.12ms p(90)=30.32ms p(95)=38.67ms
http_req_receiving.........: avg=223.36µs min=18.63µs med=71.91µs max=39.84ms p(90)=143.88µs p(95)=217.81µs
http_req_sending...........: avg=461.61µs min=17.23µs med=46.8µs max=62.26ms p(90)=335.01µs p(95)=857.64µs
http_req_tls_handshaking...: avg=0s min=0s med=0s max=0s p(90)=0s p(95)=0s
http_req_waiting...........: avg=12.6ms min=2.59ms med=8ms max=106.26ms p(90)=28.61ms p(95)=36.55ms
http_reqs..................: 47699 794.982442/s
iteration_duration.........: avg=13.48ms min=2.75ms med=8.47ms max=185.95ms p(90)=30.55ms p(95)=38.91ms
iterations.................: 47699 794.982442/s
vus........................: 31 min=2 max=31
vus_max....................: 32 min=32 max=32
```
### Interpretation
At first glance, the performance is pretty good. In the simplest scenario (5 concurrent clients), we can get up to `1000 rps` with the p95 response time at `6.59 ms` (`14986` total requests made).
As we add more concurrent clients, the rps drops a bit (`794 rps`) but still provides a good timing (p95 `38.67ms`) with high throughput at `47699` request made in 15s window (3x compared to Test 1).
The CPU utilization is at 100% on every core available. The memory usage is stable at `~13 Mb RSS`.
## Demo
[![Pastebin service demo](https://i.imgur.com/Fv19H71.png)](https://www.youtube.com/watch?v=BG7f61H7C4I "Pastebin service demo")