The cause of this problem can be determined by the network monitor trace. Generally, packets need to be captured on the client, server, and at the same time.
Analyze the following steps:
1. time when the client sends a request.
2. Time when the server accepts the request.
3. the server sends the corresponding time.
4. The client accepts the corresponding time.
5. The next time the client sends a request.
The transmission speed of the network can be seen from 1, 2.
From 2, 3, we can see the speed at which the server processes the request.
The transmission speed of the network can be seen from 3, 4.
From 4, 5, we can see the speed at which the client continuously initiates requests.
We need to diagnose and troubleshoot the bottleneck.
If the time is delayed in 4 or 5, you may need to capture the Process Monitor log for analysis to see what the client is doing during that time. for example, disk read/write and registry query.
WPAD is one of the reasons why WebDAV is slower than other upload methods.