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k6 load testing

Read a performance requirement

Easy30 pts~12 min
  • Performance requirements
  • SLOs
Practice app · Checkout Service

A load-testable checkout service with realistic latency that degrades under concurrency, plus a live metrics view.

BASE_URL
/api/practice
Console app
/lab/performance-testing-read-a-performance-requirement

Your starter code already declares BASE_URL — call the API relative to it.

Objective

Translate “checkout must serve 5 concurrent users with p95 under 500 ms and under 1% errors” into an executable script.

Your task

  1. 1Set options { vus: 5, duration: '10s' }.
  2. 2Declare thresholds 'http_req_duration': ['p(95)<500'] and 'http_req_failed': ['rate<0.01'].
  3. 3GET BASE_URL + "/perf/checkout", check status 200, sleep(0.5).

Acceptance criteria

  • GET /perf/checkout returns 200
  • Thresholds encode the requirement
  • ≥ 40 requests, p95 < 500 ms, error rate < 1%

k6 load testing · Performance Testing · Foundations