[ikskuh]

This is sadly very badly worded.

Zig provides a global allocator when running tests that will check for memory leaks and double frees. This allocator is only available in the test suite tho, if you want to compile an executable, one has to chose between several allocators and instantiate them explicitly.

There are three allocators that are globally available in the standard library: - `std.heap.c_allocator`, a wrapper around malloc/free. only available when linking libc - `std.heap.page_allocator`, a wrapper around VirtualAlloc/mmap. Can only allocate in OS page size granularity and is quite slow. A good backing for other allocators tho. - `std.testing.failing_allocator`, an allocator that will always yield OutOfMemory.

For the use in an application, there's the std.heap.GeneralPurposeAllocator type that needs to be explicitly instantiated, and it provides a good portion of debugging features right now. High-speed implementations are planned for release modes