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.
This graph shows build times of circuits used for downloading static files of different sizes over Tor. At op-*a OnionPerf instances we use Entry Guards and rotate them every 12 hours. We disable Entry Guards at the remaining OnionPerf instances, though, to ensure a new guard is selected for each circuit we measure. In comparison, standard clients will reuse connections to a small number of long-term entry guards, and do not see the latency introduced by establishing new guard connections. As a result, first hop build times appear higher for these measurements compared to those commonly observed in Tor clients. The graph shows the range of measurements from first to third quartile, and highlights the median. The slowest and fastest quarter of measurements are omitted from the graph.
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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.