On Fri, 22 Aug 2025, Lars Sunde via curl-library wrote:
We are running C++ software that uses libCurl 8.5 on Windows 10 and 11 that
perform HTTP operations.
During testing I notice a difference in some rare situations when running
the software in Window 11 and in a virtual machine. The virtual machine is
Oracle Virtual Box with Windows 11 host and Windows 10 guest OS).
We enabled CURLOPT_VERBOSE to debug the issue when the software attempts to
perform a HTTP post operation.
I suspect you are seeing Windows working as designed. I believe this is more
or less the same problem I blogged aobut last year:
https://daniel.haxx.se/blog/2024/08/14/slow-tcp-connect-on-windows/
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