On Wed, Jun 30, 2021 at 06:43:03PM -0600, David Fifield wrote:
While experimenting with another tunnel built on KCP and smux, I discovered that performance could be greatly increased by increasing the size of smux buffers. It's likely that doing the same can also improve performance in Snowflake.
I spent a good deal of time trying to see if adjusting the size of smux buffers could also improve the performance of dnstt. The full information is here:
https://www.bamsoftware.com/software/dnstt/performance.html#download-2021080...
I had mixed results. I initially had promising results when connecting directly to the dnstt server using plaintext UDP DNS, without a recursive resolver. But the configurations with a recursive resolver proved difficult to optimize.
These are the parameters I settled on: * smuxConfig.MaxStreamBuffer = 1 * 1024 * 1024 (both client and server) * KCP conn.SetWindowSize(64, 64) * turbotunnel.queueSize = 128 You can see numbers from my brief parameter search in the commit message: https://repo.or.cz/dnstt.git/patch/de15c5a51291cae19dfad26149f00b2b836edfb3