Here's what I've done:
- I wrote a minimal web server (using Qt, but I don't think it's relevant here).
- I'm running it on a legal Windows 7 32-bit.
- If I make a request with Firefox, IE, Chrome or Safari it takes takes about one second before my server sees that there is a new connection to be accepted.
- Using other clients (wget, own test client that just opens a socket) than Firefox, IE, Chrome, Safari seeing the new connection is matter of milliseconds.
- I installed Apache and tried the clients mentioned above. Serving the request takes ~50ms as expected.
- The problem isn't reproducible when running Windows XP (or compiling and running the same code under Linux)
- The problem seems to present itself only when connecting to localhost. A friend connected over the Internet and serving the connection was a matter of milliseconds.
- Running the server in different ports has no effect on the 1 second latency
Here's what I've tried without luck:
- Stopped the Windows Defender service
- Stopped the Windows Firewall service
Any ideas? Is this some clever 'security feature' in Windows 7? Why isn't Apache affected? Why are only the browsers affected?