Latency Percentile Analyser

Why percentiles, not averages

An average is dominated by the bulk of your traffic and barely moves for a handful of slow outliers — so a system can look healthy on the mean while a meaningful slice of users suffer. p95 and p99 describe the shape of the distribution, including the tail real users feel. The "mean vs p99 gap" above shows exactly how much the average is hiding.

Notes

• Percentiles use the nearest-rank method on your samples.
• Everything runs locally in your browser — nothing is uploaded.
• Don't average percentiles across machines; combine the raw samples first, then compute once.

More: why p99 matters.