Does STL Vector use 'new' and 'delete' for memory allocation by default?

Question

I am working on a plugin for an application, where the memory should be allocated by the Application and keep track of it. Hence, memory handles should be obtained from the host

Answer 1

The actual std::allocator has been optimized for a rather large extent of size objects. It isn't the best when it comes to allocating many small objects nor is it the best for many large objects. That being said, it also wasn't written for multi-threaded applications.

May I suggest, before attempting to write your own you check out the Hoard allocator if you're going the multi-threaded route. (Or you can check out the equally appealing Intel TBB page too.)