flopscope.accounting.roots_cost
flopscope.accounting.roots_cost(n)[flopscope source]
Cost for roots: companion-matrix eigenvalues — delegates to
eigvals_cost(n) (~10n^3; building the companion matrix itself is free). Includes runtime scaling; see docs/reference/cost-model.md.
Parameters
- n:int
Number of columns in the input matrix.
Returns
- :int
Weighted public cost estimate, floored to match runtime accounting.
Notes
This helper multiplies the analytical FLOP count by the active weight from flopscope._weights and then applies int(...) so public estimates match budget deductions.