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TCP/IP Connect:

 Hello,


I am using Fiddler for the 1st time and hence my questions would be very basic, thank you for understanding.

I am trying to understand why a website is slow.


Under the statistics tab I found the below:-


In one response - TCP/IP Connect: is 20 seconds & ServerDoneResponse is 35 seconds


In 2nd response - TCP/IP Connect: is only 23 ms  & but ServerDoneResponse is 29 seconds


What is the significance of TCP/IP connect

Is the ServerDoneresponse time taken by server to respond after receiving a request.

Example Response 1


Request Count: 1
Bytes Sent: 220 (headers:220; body:0)
Bytes Received: 187 (headers:187; body:0)
Tunnel Sent: 3,173
Tunnel Received: 13,05,446
ACTUAL PERFORMANCE
--------------
ClientConnected: 10:13:25.523
ClientBeginRequest: 10:13:25.528
GotRequestHeaders: 10:13:25.528
ClientDoneRequest: 10:13:25.528
Determine Gateway: 0ms
DNS Lookup: 0ms
TCP/IP Connect: 21049ms
HTTPS Handshake: 0ms
ServerConnected: 10:13:46.573
FiddlerBeginRequest: 10:13:46.573
ServerGotRequest: 10:13:46.573
ServerBeginResponse: 00:00:00.000
GotResponseHeaders: 00:00:00.000
ServerDoneResponse: 10:14:21.136
ClientBeginResponse: 10:14:21.136
ClientDoneResponse: 10:14:21.136
Overall Elapsed: 0:00:55.607
RESPONSE BYTES (by Content-Type)
--------------
~headers~: 187

Example Response 1

Request Count: 1
Bytes Sent: 220 (headers:220; body:0)
Bytes Received: 184 (headers:184; body:0)
Tunnel Sent: 1,476
Tunnel Received: 2,754
ACTUAL PERFORMANCE
--------------
ClientConnected: 10:35:25.415
ClientBeginRequest: 10:35:25.416
GotRequestHeaders: 10:35:25.416
ClientDoneRequest: 10:35:25.416
Determine Gateway: 0ms
DNS Lookup: 0ms
TCP/IP Connect: 23ms
HTTPS Handshake: 0ms
ServerConnected: 10:35:25.439
FiddlerBeginRequest: 10:35:25.439
ServerGotRequest: 10:35:25.439
ServerBeginResponse: 00:00:00.000
GotResponseHeaders: 00:00:00.000
ServerDoneResponse: 10:35:56.086
ClientBeginResponse: 10:35:56.086
ClientDoneResponse: 10:35:56.086
Overall Elapsed: 0:00:30.669

--------
Thanks
Srinivasan
1 Comment

Hello  Srinivasan,


The first thing to clarify is that you are using the old Fiddler while the forum is related to the new cross-platform Fiddler Everywhere.

That said, timings for TCP/IP Connect in the range of 21000+ms (21+ seconds) are most likely indicating that Fiddler could not make a successful connection to the server (see more here).

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