FWIW I did acknowledge this in the article: > A sufficiently smart memory allocator might achieve the same thing, especially if you allocate the whole AST up f

FWIW I did acknowledge this in the article: > A sufficiently smart memory allocator might achieve the same thing, especially if you allocate the whole AST up front and never add to it > Again, a really fast malloc might be hard to compete with—but you basically can’t beat bump allocation on sheer simplicity.