I read everywhere that in C++ it is not possible to get the size of a dynamic array just from the pointer pointing to that chunk of memory.
People talk about what the stack and heap are and the differences between them. But I am curious to know that if a CPU does not support stack and heap structure, then can C run properly without a stack and a heap?
There is a drastic performance hit when using a keyfunc in heapq.nlargest:I expected a small extra cost, perhaps something like 30% - not 400%. This degradation seems to be reproducible over a few different data sizes. You can see in the source code there is a special-case handling for if...
From Stroustrup's Foundations of C++, he offers a pure object-oriented language (on Page 4).He assumes a in the pure object-oriented language is allocated on the heap, and a's memory layout looks like: