flopscope.accounting.rfftn_cost

shape:tuple[int, ...]

Shape of the array passed to the analytical cost formula.

:int

Weighted public cost estimate, floored to match runtime accounting.

This helper multiplies the analytical FLOP count by the active weight from flopscope._weights and then applies int(...) so public estimates match budget deductions.

Exploits conjugate symmetry along the last axis, roughly halving the work compared to a full complex N-D FFT.