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Has anybody used SmallObjectAllocator from Modern C++ Design by Andrei Alexandrescu in a big project? I want to implement this allocator but I need some opinions about it before using it in my project. I made some tests and it seems very fast, but the tests were made in a small test environment. I want to know how fast it is when are lots of small objects(like events, smart pointers, etc) and how much extra memory it uses.
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Memory pools, also called fixed-size blocks allocation, is the use of pools for memory management that allows dynamic memory allocation comparable to malloc or C++'s operator new.
Allocators handle all the requests for allocation and deallocation of memory for a given container. The C++ Standard Library provides general-purpose allocators that are used by default, however, custom allocators may also be supplied by the programmer.
Allocators are used by the C++ Standard Library to handle the allocation and deallocation of elements stored in containers. All C++ Standard Library containers except std::array have a template parameter of type allocator<Type> , where Type represents the type of the container element.
Bump allocation is a fast, but limited approach to allocation. We have a chunk of memory, and we maintain a pointer within that memory. Whenever we allocate an object, we do a quick check that we have enough capacity left in our chunk to allocate the object and then update the pointer by the object's size. That's it!
I suggest you ask Rich Sposato. He has done extensive work on Loki's small object allocator, including testing and benchmarks.
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Have you considered using Boost Pool Library ?
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