What are the different types of allocators in C++11?

What are the different types of allocators in C++11?

In C++11, there are several types of allocators, including the default allocator, custom allocators, and pool allocators. The default allocator is used for standard containers, while custom allocators allow for user-defined memory management strategies.

Can you explain the default allocator in more detail?

The default allocator in C++11 is the standard allocator provided by the STL. It uses the global new and delete operators for memory allocation and deallocation. It's designed to be efficient and works well with standard containers.

What is a custom allocator and when would I use one?

A custom allocator allows you to define your own memory allocation strategy. You might use one when you need specific memory management features, such as pooling, tracking memory usage, or optimizing for performance in a particular scenario.

What are pool allocators and how do they differ from other allocators?

Pool allocators manage a pool of memory blocks of a fixed size, which can improve performance by reducing fragmentation and allocation overhead. Unlike the default allocator, which allocates memory individually, pool allocators allocate memory in larger chunks.