GameDev.net is your resource for game development with forums, tutorials, blogs, projects, portfolios, news, and more. Function Call Overhead lua-users wiki: Optimisation Coding Tips Exclusive Online-Only | Costco Overhead of copying lua functions. Lua Similarly, call lua_pushnumber to push the second parameter y to the stack. The C to Lua transition is even more costly than the Lua to C transition. You can use luabind or something to expediate this, but you can also do it in raw lua.//A function that we're gonna register.static int l_sin (lua_State *L) { double d = lua_tonumber(L, 1); /* get argument */ lua_pushnumber(L, sin . Lua Compact Debug (LCD 2. Arguments passed to the Lua function use_self. (A == B) is not true. The Lua method was about 1.16 times as slow as the C++ method call. In other words: don't do this in performance sensitive parts of your applications. I m guessing this could be done via C++ Functors but I m not s lua function call overhead Arguments passed to the Lua function use_self. Here is where I get confused. Function call Overhead We are starting to benchmark various schedules since this chapter. I would like to see a tutorial truly customized to Wiki users that shows a side-by-side comparison between a syntax template and lua module which use the same input and output the same result. In general, you'll have to bind your C++ functions to lua. It’s well known that Python is not the fastest language on earth. The problem is with the Lua/C API, the overhead is in the API itself, not in any Lua code. When profiling the application, I noticed that one of the caching steps was taking much longer that any of the others. As per my understanding when we call a non-inlined function like foo() program control will shift to called function address then store the location of caller and return bank to the caller to another Performance does matter in some situations, but readability and maintainability of code is usually more important. To answer: using a single lua_State will be faster if you need to load any standard libraries (the overhead is noticeable). So simply have 1 state, and dofile the scripts. This page gives a short introduction to the usage of the FFI library. In fact, the performance gains in Lua compared to parser functions are so great that it isn't a big deal at all to add input checks for all your functions or to use meta-modules like Module:HtmlBuilder. lua Both styles have approximately the same overhead: one function call per iteration. Before diving into various execution time numbers, we need to be aware of the overhead of issuing a function call in Python. On Linux (maybe Mac too) you can use time command. (For instance, consider the problem of iterating over two files comparing them … Calling C++ functions from Lua 5.2 - Pistachio Brainstorming

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