add a no label benchmark

benchmarking/README.md

@@ -3,5 +3,5 @@ We are using [k6](https://k6.io/) for our benchmarking. To run one of the perfor
 tests you can do:
 
 ```
-k6 run -e PAG_HOST=http://localhost --vus 10 --duration 30s  benchmarking/perf1.js
+k6 run -e PAG_HOST=http://localhost --vus 10 --duration 30s  benchmarking/labels.js
 ```

benchmarking/no_labels.js

@@ -0,0 +1,36 @@
+import http from 'k6/http';
+import { check } from 'k6';
+
+function getRandInteger(min, max) {
+  return Math.floor(Math.random() * (max - min) ) + min;
+}
+
+/*
+Original prom-agg-gateway doesn't support labels so this perf test
+is here mostly to compare against them.
+*/
+export default function () {
+  const url = `${__ENV.PAG_HOST}/metrics/`;
+
+  const randomMetric1 = getRandInteger(1, 50)
+  const randomMetric2 = getRandInteger(1000, 3000)
+  const randomMetric3 = getRandInteger(3000, 4000)
+
+  const payload = `
+  # TYPE some_metric counter
+  some_metric{label="val1"} ${randomMetric1}
+  # TYPE another_metric gauge
+  # HELP another_metric Just an example.
+  another_metric ${randomMetric2}
+  k6_http_requests_total{method="post",code="200"} ${randomMetric3}
+  `
+
+  const params = {
+    headers: {
+      'Content-Type': 'application/json',
+    },
+  };
+
+  const res = http.post(url, payload, params);
+  check(res, { 'status was 200ish': (r) => r.status < 300 });
+}