Latency & throughput
Measure how fast a proxy really is: TCP connect time, time to first byte, total round-trip and a small download throughput sample — through HTTP, HTTPS or SOCKS5.
| Metric | Result | What it means |
|---|---|---|
| TCP connect | - | Time to open the socket to the proxy — network distance + proxy load. |
| Time to first byte | - | Until the first response byte arrives through the proxy. |
| Total time | - | Full request round-trip through the proxy. |
| Throughput | - | Small download sample — a quick diagnostic, not a full bandwidth benchmark. |
Test a proxy to see its speed profile.
For scraping and automation, under ~300 ms total is fast, 300–1000 ms is usable, and multi-second proxies stall pipelines. Free proxies swing wildly with load — re-test before relying on one, and prefer proxies geographically close to your target.
The bulk proxy checker measures speed for a whole list in parallel and lets you export the fast ones. For rotating endpoints, the rotating proxy tester samples repeatedly and reports unique exit IPs.