bpo-44945: Specialize BINARY_ADD by markshannon · Pull Request #27967 · python/cpython

markshannon

Feel free to ignore, but you can reorder this to

            PyUnicode_Append(&SECOND(), right);
            STACK_SHRINK(1);
            Py_DECREF(right);
            Py_DECREF(left);
            if (TOP() == NULL) {
                goto error;
            }

Then if you'd like, you can factor out the code from STACK_SHRINK(1); onwards into a BINARY_ADD_FOOTER macro, and reuse that for all BINARY_ADD_* instructions.