Hi!

In script we store data in angel script classes. Also we have array of classes.

Sample look like:

class StoreData

{

int data1, data2;

float data1, data2;

}

array<StoreData> data;

But big problem lie in fact that in memory 100 elements of array is just pointers. Actual data lies randomly in memory, so if we try to access to field data1 of 100 elements in loop we catch many many cache misses. Also we cannot binary save this array we must access to every field of every element in array.

So classes in array is big bottleneck.

Is it possible to avoid this issue?

Thanks for reply!

But using custom allocator it is not solution. Script array already store data in one chunk. But script class itself allocated by AngelScript so array it is just array of pointers to angel script representation of class. I can not hack Angel Script to make allocate arrays of classes in one chunk.

That's why i have recommended custom allocator.

AS_API int asSetGlobalMemoryFunctions(asALLOCFUNC_t allocFunc,	asFREEFUNC_t freeFunc)

http://www.angelcode.com/angelscript/sdk/docs/manual/angelscript_8h.html#a527ab125defc58aa40cc151a25582a31

Hi!

Thanks to link leads to documentatios. But please before answer again try to understend what i want to achieve.

In c++ if i define array like this -

struct Data

{

float a,b,c;

}

std::vector<Data> data;

when i go throught loop of each element of array access speed to element will be maximized because data lie in cache. If I repace array to

std::vector<Data*> data;

access to each element may leed to p?tention cache miss becase pointers in array may point at random places in memory. If accessed data lie all in one chank there still potentional chace miss.

cusom allocators from angel script is good but that mean write very complicated memory manager because i can call from script resize of array at any time and how my manager supose to understend that i must resize exetly that array? it is almost imposible without hacking angelscript.

i understend - angel script goes by way of sand box. But sand box means big perfomance problems. We currently work on mobile title and angel script is big big perfomance issue. I prefer get more control points to trade safety to speed.

Sorry, i can't think anything other than custom allocators.

You can position your data any place that way. Won't be easy as you said.

There are many additional benefits using custom allocators: leak detection, memory statistics, defragmentation etc..

You might also consider creating a static array container. It still requires the custom allocator, but it's easier to write for sure.

AngelScript doesn't have static arrays yet.