This is now fixed and available starting with Windows 10 build 21332 through the Windows Insider Program dev channel. The issue turned out to be in the interaction between the Windows TCP stack and firmware on the Network Interface Controllers (NIC) we use on our Edge servers.Īs a result, Microsoft improved the Windows implementation of the TCP RACK-TLP algorithm and its resilience to packet reordering. We then worked with the Windows Core TCP team to triage the problem, find workarounds, and eventually fix it. In one of these, we found a discrepancy in upload speeds between Windows and Linux. We love shared troubleshooting sessions with their own engineering teams to find and eliminate bottlenecks. One of the best ways to find ways to improve performance, we’ve found, is to work closely with our customers.
