ricmzn/luamimalloc

Lua extension for DCS to use mimalloc instead of the default memory allocator

Instructions

• Make sure you have Visual Studio 2017 or 2019 installed with C++ build tools

• Clone and build mimalloc (https://github.com/microsoft/mimalloc) and Lua 5.1 (https://www.lua.org/ftp/lua-5.1.5.tar.gz) in the parent directory, as static libraries

  • To build Lua 5.1 in Visual Studio, create a DLL project, add all files in src/, and delete luac.c

• Build LuaMimalloc.dll (this project)

• Copy the built .dll and Z_LuaMimallocLoader.lua to Saved Games/DCS_server/Scripts/Hooks

• To enable the use of the custom allocator in missions, the mission environment also needs to be unsanitized on the server (edit Program Files/Eagle Dynamics/DCS World Dedicated Server/Scripts/MissionScripting.lua)

• Optional: enable the allocator in Export scripts by adding the following to the start of Saved Games/Scripts/Export.lua:

xpcall(function()
    package.cpath = package.cpath..";"..lfs.writedir().."/Scripts/Hooks/?.dll"
    require("LuaMimalloc")
    log.write("Export.lua", log.INFO, "LuaMimalloc.dll loaded")
end, function(err)
    log.write("Export.lua", log.ERROR, "Failed to load LuaMimalloc.dll: "..tostring(err))
end)

Note: build paths are set up for x64 only

Known issues

• The loader lua needs to start with Z to make sure it runs after Tacview, otherwise Tacview fails to load its own DLL for unknown reasons