Unity3d Get Heap and Memory Size

Unity3d is a very powerful game engine. Underneath it makes use of the awesome Mono framework, which makes it possible for people to write video games using C#. How awesomer can things get?

Below is a code snippet that one can use to get the heap size and the used memory size.

#if UNITY_IPHONE && !UNITY_EDITOR

    [DllImport("__Internal")]

#else

       [DllImport("mono")]

#endif

static extern long mono_gc_get_used_size();  //Amount Used

#if UNITY_IPHONE && !UNITY_EDITOR

    [DllImport("__Internal")]

#else

       [DllImport("mono")]

#endif

       static extern long mono_gc_get_heap_size(); //Total Amount

long memUsed = mono_gc_get_used_size();

long deltaMem = memUsed - previousMemUsed;

long heapSize = mono_gc_get_heap_size();

float percentageMemUsed = (memUsed / (float)heapSize) * 100;

previousMemUsed = memUsed;

For more profiling, use these tools: http://docs.unity3d.com/Documentation/Manual/Profiler.html