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  1. MariaDB Server
  2. MDEV-20542

Windows, compiling : enable /d2OptimizeHugeFunctions for MySQLParse()

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Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • 5.5(EOL), 10.1(EOL), 10.2(EOL), 10.3(EOL), 10.4(EOL), 10.5
    • 10.2.29
    • Compiling, Platform Windows
    • None

    Description

      MSVC massively scales down on optimization depending of the function size.
      bison generated MySQLParse() is considered "huge" by the compiler . I verified this by adding /we4883 flag to compiler options. That makes making (usually inactive) warning "function size prevents optimization" an error.

      There is a switch that allows optimizations also for such functions, /d2OptimizeHugeFunctions.
      (docs https://support.microsoft.com/en-nz/help/3207317/visual-c-optimizer-fixes-for-visual-studio-2015-update-3)

      MySQL 8.0 is using it, according to
      https://dev.mysql.com/doc/relnotes/mysql/8.0/en/news-8-0-13.html

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            wlad Vladislav Vaintroub
            wlad Vladislav Vaintroub
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            Dates

              Created:
              Updated:
              Resolved:

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