https://en.greatfire.org/blog/2016/jul/greatfireorg-now-testing-vpn-speed-an... https://cc.greatfire.org/en "Our newest website, Circumvention Central (CC), aims to provide real-time information and data about circumvention solutions that work in China. Since 2011, we have been collecting data about blocked websites in China and now we will add data about the effectiveness of VPNs and other circumvention tools."
They list various VPNs and other tools. Tor is on the list. (This page has JavaScript charts that aren't working for me in Tor Browser.) https://cc.greatfire.org/en/provider/Tor
At the moment, these are the figures I see: Speed (kbps) Stability 1. HideMyAss 504 (+39%) 98% (-1%) 2. VyprVPN 445 (−33%) 98% (+11%) 3. FreeBrowser 440 (+13%) 88% (+1%) 4. XX-Net 356 (New) 97% 5. Astrill 294 (−32%) 97% (+1%) 6. Lantern 262 (+15%) 95% (+3%) 7. VPNSecure 259 (New) 87% 8. Psiphon 218 (+6%) 89% (+2%) 9. Ultrasurf 206 (+460%) 86% (−4%) 10. Freegate 188 (−29%) 91% (+1%) 11. PureVPN 151 (−25%) 94% (+1%) 12. Tor 112 (+237%) 96% (+1%)
The test details have interesting values under the "Settings" header: https://cc.greatfire.org/en/provider/Tor#http-tests "0", "socks5", "是", "lantern-proxy", "lantern-proxy,no bridge", "lantern-proxy,meek-arzue", "proxy,no bridge", "lantern-proxy,obfs4", "obfs4", "否", "meek-arzue", "obfs4,sock5 proxy".
There's a tool on the list I didn't know, XX-Net. Its GitHub page says "It uses google app engine (GAE) as a proxy server through the firewall" and "A Reborn GoAgent." https://github.com/XX-net/XX-Net