Modern performance engineering shifts load testing left into CI/CD pipelines. Grafana k6 allows writing high-throughput test scenarios directly in JavaScript with zero GUI overhead.

import http from 'k6/http';
import { check, sleep } from 'k6';

export const options = {
  stages: [
    { duration: '30s', target: 500 },
    { duration: '1m', target: 2000 },
    { duration: '30s', target: 0 },
  ],
  thresholds: {
    http_req_duration: ['p(95)<200'],
  },
};

export default function () {
  const res = http.get('http://api.internal/v1/checkout');
  check(res, { 'status is 200': (r) => r.status === 200 });
  sleep(1);
}