Startup delay due to compiling

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  • Chris Zopers
    #1

    Startup delay due to compiling

    Hello,

    To prevent my webapplication from compiling when a user first visit's
    the site, I precompile the application with the aspnet_compiler tool
    (aspnet_compile r -p physicalOrRelat ivePath -v / targetPath).

    When the application ends/stops because of inactivity for a while, it
    still takes some time when a user tries to access the site again. This
    is only on the first visit after the site has stopped, after that
    everything works fine and fast. FYI, I do not use any code in the
    Application_Sta rt event, so that can't be the problem.

    Anyone got an idea, am I doing something wrong perhaps with the compiler
    tool?

    Greetings,
    Chris

    *** Sent via Developersdex http://www.developersdex.com ***
    Tags: None
    • Mark Fitzpatrick
      #2
      Re: Startup delay due to compiling

      No, you're not doing anything wrong, this is the way it is. You compile the
      site into Intermediate Language (IL). When the application starts up, it
      compiles it into machine language and caches that and assigns resources.
      Part of the delay is just the application starting up again regardless of
      anything going on in the Application_Sta rt event.

      Hope this helps,
      Mark Fitzpatrick
      Microsoft MVP - Expression

      "Chris Zopers" <test123test12@ 12move.nlwrote in message
      news:eY7unVT1IH A.4704@TK2MSFTN GP05.phx.gbl...
      Hello,
      >
      To prevent my webapplication from compiling when a user first visit's
      the site, I precompile the application with the aspnet_compiler tool
      (aspnet_compile r -p physicalOrRelat ivePath -v / targetPath).
      >
      When the application ends/stops because of inactivity for a while, it
      still takes some time when a user tries to access the site again. This
      is only on the first visit after the site has stopped, after that
      everything works fine and fast. FYI, I do not use any code in the
      Application_Sta rt event, so that can't be the problem.
      >
      Anyone got an idea, am I doing something wrong perhaps with the compiler
      tool?
      >
      Greetings,
      Chris
      >
      *** Sent via Developersdex http://www.developersdex.com ***

        Comment

        • Chris Zopers
          #3
          Re: Startup delay due to compiling

          Okey, so not using the compiler tool would mean that on the first visit
          the site will be compiled to IL and after that to machine language (two
          times compiling) and using the compiler tool would mean that the first
          compiliation (into IL) does not have to take place anymore? Am I getting
          this right? So using the compiler tool would improve the startup time a
          bit by eliminating the compilation into IL?

          Greetings,
          Chris




          *** Sent via Developersdex http://www.developersdex.com ***

            Comment

            • Madhur
              #4
              Re: Startup delay due to compiling

              You may try doing the NGEN to obtain the machine code beforehand.

              --
              Madhur

              "Chris Zopers" <test123test12@ 12move.nlwrote in message
              news:Ox0grfT1IH A.4948@TK2MSFTN GP02.phx.gbl...
              Okey, so not using the compiler tool would mean that on the first visit
              the site will be compiled to IL and after that to machine language (two
              times compiling) and using the compiler tool would mean that the first
              compiliation (into IL) does not have to take place anymore? Am I getting
              this right? So using the compiler tool would improve the startup time a
              bit by eliminating the compilation into IL?
              >
              Greetings,
              Chris
              >
              >
              >
              >
              *** Sent via Developersdex http://www.developersdex.com ***

                Comment

                • =?Utf-8?B?QldD?=
                  #5
                  Re: Startup delay due to compiling

                  That's correct.

                  You can control the delay you're experiencing with the JIT compiler, by
                  modifying the web.config setting for compilation. Setting batch="false" will
                  cause each page to be compiled individually as it is first requested - rather
                  than compiling a number of pages into machine specific binaries.

                  <compilation batch="false">

                  You can also configure the batch size, and other details.
                  compilation Element (ASP.NET Settings Schema)
                  http://msdn.microsoft.com/en-us/library/s10awwz0.aspx


                  Best of luck,
                  BWC

                  "Chris Zopers" wrote:
                  Okey, so not using the compiler tool would mean that on the first visit
                  the site will be compiled to IL and after that to machine language (two
                  times compiling) and using the compiler tool would mean that the first
                  compiliation (into IL) does not have to take place anymore? Am I getting
                  this right? So using the compiler tool would improve the startup time a
                  bit by eliminating the compilation into IL?
                  >
                  Greetings,
                  Chris
                  >
                  >
                  >
                  >
                  *** Sent via Developersdex http://www.developersdex.com ***
                  >

                    Comment

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