| p50 Latency | Median response time — 50% of requests completed faster than this. A good baseline for typical user experience. |
| p95 Latency | 95% of requests completed faster than this. Captures the slower tail; useful for SLA definitions. |
| p99 Latency | 99% of requests completed faster than this. Represents near-worst-case response times experienced by users. |
| p99.9 Latency | 99.9% of requests completed faster than this. The extreme tail — relevant for high-volume services where one in a thousand users sees very high latency. |
| Apdex | Application Performance Index (T=${apdex_t}ms). Score 0–1: satisfied ≤ T ms, tolerating T–4T ms, frustrated > 4T ms or error. ≥0.85 Good, ≥0.70 Acceptable, <0.70 Poor. |
| RPS | Requests per second for this endpoint over the test duration. |
| Bytes | Total response bytes received for this endpoint. |
| p50 Completion | Elapsed time from test start by which 50% of all requests had finished. Accounts for both when the request was sent and how long it took. |
| p95 Completion | Elapsed time from test start by which 95% of all requests had finished. |
| p99 Completion | Elapsed time from test start by which 99% of all requests had finished. High values indicate request queuing or late-stage slowdowns. |
| OK% | Percentage of requests that returned the expected HTTP status with no network error. |
| Avg RPS | Total requests divided by total test duration — the overall throughput of the run. |
| Errs | Count of failed requests (unexpected status or network errors such as timeout, connection refused). |