API Performance & Load Testing with Grafana k6

Load testing validates that API infrastructure can withstand unexpected traffic surges, black friday spikes, and breaking concurrency thresholds.

**TL;DR:** Benchmark API latency and throughput using Grafana k6 scripts with automated threshold checks in CI/CD pipelines.

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Grafana k6 Load Test Blueprint Script

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

export const options = {
  stages: [
    { duration: '30s', target: 50 },  // Ramp up to 50 users
    { duration: '1m', target: 200 },  // Stay at 200 users
    { duration: '20s', target: 0 },   // Ramp down
  ],
  thresholds: {
    http_req_duration: ['p(95)<200'], // 95% of requests must complete under 200ms
    http_req_failed: ['rate<0.01'],   // Error rate must be under 1%
  },
};

export default function () {
  const res = http.get('https://api.incosstech.com/v1/health');
  check(res, { 'status was 200': (r) => r.status === 200 });
  sleep(1);
}