Il2cpp source code6/29/2023 Overall, it looks very similar to the array-based for loop with length caching, null-, and bounds-checks except for those function calls. Make sure the device is not connected to your PC via USB. It’s a pretty literal translation of our C# code with calls to List_1_get_Count_m186164705 to get the Count property and List_1_get_Item_m888956288 to use the indexer. Make sure your device is connected to the same network as your PC and start the app on your device. The first part of this function is just that and the rest is the actual loop. Everything’s exactly the same for while and do-while loops, so only for loops will be covered here.Įxtern "C" int32_t TestClass_ForArra圜hecksDisabled_m816776997 (RuntimeObject * _this /* static, unused */, Int32U5BU5D_t385246372 * _array0, const RuntimeMethod * method ) Īs we know, using methods of a generic type means IL2CPP will generate method initialization overhead for us. Let’s start with the C# for a for loop on an array when we’ve told IL2CPP to disable null- and bounds-checks and we’re caching the array’s Length field as a local variable. Along the way we’ll look at the C# source code we write, the C++ source code that IL2CPP in Unity 2017.3 generates for our C#, and the ARM assembly code that Xcode 9.2 compiles to for an release build on iOS. Today we’ll progress from the fastest possible loop to the slowest. We’ll even go further and look at the ARM assembly that the C++ compiles to and really find out how much overhead our choices are costing us.Īrray for loop, checks disabled, Length cached So today’s article dives into the C++ code that IL2CPP outputs when we write these various types of loops to examine the differences. There are many permutations of loops we can write, but what do they compile to? We should know the consequences of using an array versus a List, for versus foreach, caching Length, and other factors.
0 Comments
Leave a Reply. |