performance-testing

# Performance Testing ## k6 Script Patterns ### Basic scenario with stages ```javascript // k6 run load-test.js import http from 'k6/http' import { check, sleep } from 'k6' export const options = { stages: [ { duration: '30s', target: 10 }, // ramp up { duration: '1m', target: 50 }, // hold load { duration: '30s', target: 0 }, // ramp down ], thresholds: { http_req_duration: ['p(95)<200', 'p(99)<500'], http_req_failed: ['rate<0.01'], // < 1% error rate }, } export default function () { const res = http.get('https://api.example.com/users') check(res, { 'status is 200': (r) => r.status === 200, 'response time < 200ms': (r) => r.timings.duration < 200, }) sleep(1) } ``` ### POST with auth ```javascript export default function () { const payload = JSON.stringify({ email: 'test@example.com', password: 'secret' }) const headers = { 'Content-Type': 'application/json' } const res = http.post(`${BASE_URL}/auth/login`, payload, { headers }) const token = res.json('token') http.get(`${BASE_URL}/profile`, { headers: { Authorization: `Bearer ${token}` }, }) } ``` ## Load Test Types | Type | Duration | Target VU | Purpose | |------|----------|-----------|---------| | Smoke | 1 min | 1-5 | Verify script works, no regressions | | Load | 30 min | expected peak | Normal production conditions | | Stress | 60 min | 2-3x peak | Find breaking point | | Spike | 2 min | 10x peak → 0 | Sudden traffic burst behavior ...