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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
Timeouts and failures of downloading files over Tor graph

This graph shows the fraction of timeouts and failures when downloading static files of different sizes over Tor, either from a server on the public internet or from an onion server. A timeout occurs when a download does not complete within the scheduled time, in which case it is aborted in order not to overlap with the next scheduled download. A failure occurs when the download completes, but the response is smaller than expected.

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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.