On: Show HN: I wrote an autodiff in C++ and implemente...

[pjmlp]

And instead of blaming OOP, have you actually used a profiler?

[tightbookkeeper → pjmlp]

Are you suggesting that many individual allocations and virtual dispatch are not impactful, or just advocating use of a profiler?

Once again, the context of this thread is someone taking an interest in C++ to write fast autodiff code.