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http://issues.apache.org/bugzilla/show_bug.cgi?id=42506

           Summary: JMeter threads all use the same SSL session
           Product: JMeter
           Version: 2.2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: major
          Priority: P2
         Component: HTTP
        AssignedTo: [email protected]
        ReportedBy: [EMAIL PROTECTED]


When issuing HTTPS requests, JMeter threads all use the same SSL session. This
prevents JMeter from testing real-world performance of SSL sites. (One can look
at SSL session IDs in the Apache httpd custom access log with %{SSL_SESSION_ID}x
format specifier).

This means that JMeter only does the SSL handshake once with the server in the
beginning of the test, not at the beginning of each thread. The handshake is the
expensive part of SSL protocol, and bypassing it can seriously skew the
performance figures. I've done measurements with other tools that do SSL
handshake properly, and in some cases the performance difference is 4-fold.

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