Some more work on testing congestion control in picoquic on high speed loopback links. I found out that the data rate for a 10GB download using Cubic was less than half the data rate of a 1GB download. The issue: ACK Frequency was setting a 1ms delay and a very large ACK Gap, causing feedback frequency to drop and Cubic to slow. The fix: cap the ack gap to 32. More in the blog.

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