How is overall elapsed time calculated

2 posts, 0 answers
  1. Thirukumaran
    Thirukumaran avatar
    1 posts
    Member since:
    Jul 2019

    Posted 03 Jul Link to this post

    If you look below the overall elapsed time given by fiddler is 1.377 seconds but when calculate the time between 11:56:17.495 & 11:56:20.382 it looks like it took 0:00:02.887 So how is the overall elapsed item calculated.

    ClientConnected:11:56:17.495
    ClientBeginRequest:11:56:19.004
    GotRequestHeaders:11:56:19.004
    ClientDoneRequest:11:56:19.004
    Determine Gateway:0ms
    DNS Lookup: 0ms
    TCP/IP Connect:0ms
    HTTPS Handshake:0ms
    ServerConnected:11:56:17.744
    FiddlerBeginRequest:11:56:19.004
    ServerGotRequest:11:56:19.005
    ServerBeginResponse:11:56:20.382
    GotResponseHeaders:11:56:20.382
    ServerDoneResponse:11:56:20.382
    ClientBeginResponse:11:56:20.382
    ClientDoneResponse:11:56:20.382

    Overall Elapsed:0:00:01.377

     

     

  2. Eric R | Technical Support Engineer
    Admin
    Eric R | Technical Support Engineer avatar
    230 posts

    Posted 08 Jul Link to this post

    Hi Thirukumaran,

    The Overall Elapsed time from the Statistics tab is calculated using the ​ClientDoneResponse​ value less the ​ClientBeginRequest value. Note that by default, Fiddler captures timestamps using the default system clock with a precision of 15.6 milliseconds (ms). If an operation takes less time than the 15.6ms it will appears as no time at all. This may result in slightly rounded values.

    For example, the provided ClientDoneRepsonse of 20.382 less the ClientBeginRequest of 19.004 is 1.378 which is about what the overall elapsed time is recorded. 

    To enable high-resolution timers of 1ms instead of 15.6ms, select the checkbox under Tools > Fiddler Options > General tab. This will also increase power consumption on mobile devices and laptops.




    Please let me know if you need any additional information and thank you for using the Telerik Fiddler forums.

    Regards,

    Eric R
    Progress Telerik
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