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Tor Metrics
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  • Performance

Performance

We use Torperf and OnionPerf to run performance measurements. Both work by fetching files of different sizes over Tor and measuring how long that takes.

  • Time to download files over Tor
  • Timeouts and failures of downloading files over Tor
  • Circuit build times
  • Circuit round-trip latencies
  • Throughput
Circuit round-trip latencies graph

This graph shows round-trip latencies of circuits used for downloading static files of different sizes over Tor, either from a server on the public internet or from an onion server. Round-trip latencies are measured as the time between sending the HTTP request and receiving the HTTP response header. The graph shows the median of measurements as thick line, the range of measurements from first to third quartile as ribbon, and the highest and lowest non-outlier measurements as thin lines.

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© 2009–2023 The Tor Project

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This material is supported in part by the National Science Foundation under Grant No. CNS-0959138. Any opinions, finding, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. "Tor" and the "Onion Logo" are registered trademarks of The Tor Project, Inc.. Data on this site is freely available under a CC0 no copyright declaration: To the extent possible under law, the Tor Project has waived all copyright and related or neighboring rights in the data. Graphs are licensed under a Creative Commons Attribution 3.0 United States License.