I think I found the solution: https://marci.blogs.balabit.com/2009/11/putty-performance/
PuTTY has a 16KB receive window unless you have a one way connection, then it gets a 2MB one (and that's why I was able to run pscp.exe [PuTTY scp] at full speed). So the solution is to patch PuTTY to use a larger window on two-way connections. With 250ms ping to Singapore, the receive window would only get emptied four times a second, resulting in the ~60KB/s I was stuck with. On Jan 13, 2017 10:56 PM, "Charles Alexander" <charlesalexan...@gmail.com> wrote: > One other thing: I also tried with and without Nagle's algorithm in the > PuTTY profile. > > On Fri, Jan 13, 2017 at 10:49 PM, Charles Alexander < > charlesalexan...@gmail.com> wrote: > >> I'm using svn.exe (1.9.5), connecting through svn+ssh using Plink. >> >> For a nearby DigitalOcean server (in New York, 60ms ping), I get >> checkouts and commits at hundreds of KB/s. But I am collaborating with >> someone from Australia and he was getting really slow checkouts and commits >> to the server. >> >> After lots of troubleshooting, I couldn't find anything that would speed >> it up for him. I tried making a digital ocean server in Singapore to see >> if it would be fast for him, and still be fast for me. While it is faster >> for him, I ended up seeing the same exact poor speeds he was seeing. >> >> The Singapore test server has a 280ms ping for me. My checkouts go at >> almost exactly 60KB/s. >> >> However, if I checkout from a linux VM on my same machine, through the >> same internet, using the linux svn client, I get hundreds of KB/s even to >> Singapore. >> >> Worried it might be an issue with Plink/PuTTY, I tried copying a large >> file with PuTTY's pscp.exe, and it goes at around 3400 KB/s, without >> compression. >> >> >> Anyone have any ideas on what could be causing the slow down? A checkout >> of the same exact repository from the New York server goes around ten times >> faster. And a checkout from a linux VM on the same desktop I am running >> svn.exe from went about the same, even to the Singapore server. Everything >> also goes slow when I use TortoiseSVN and not the commandline. >> >> Let me know if there is any more information I can provide to help track >> this down. >> >> Thanks, >> Charles Alexander >> >> >
