Checking Response Time & Benchmarking
Where to See Response Time
Postman displays the response time in milliseconds right next to the status code after every request, giving an immediate sense of how fast an endpoint is.
Asserting on Response Time
A simple test like pm.expect(pm.response.responseTime).to.be.below(500) can fail a run automatically if a request takes longer than an acceptable threshold.
Benchmarking Across Runs
| Approach | Purpose |
|---|---|
| Collection Runner over many iterations | Average response time under repeated load |
| Monitors over time | Track performance trends across days/weeks |
| Newman with reporters | Log timing data into CI/CD reports |
Why It Matters
Catching slow endpoints early - before users notice - helps teams keep an API responsive as it scales.
Performance is one dimension of a healthy API - next, let's look at working with a different query style entirely: GraphQL.
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