[Bug libfortran/93871] New: COTAN is slow for complex types

[thenlich at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93871

            Bug ID: 93871
           Summary: COTAN is slow for complex types
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libfortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: thenlich at gcc dot gnu.org
  Target Milestone: ---

Runtime tests show that the COTAN function (cotangent function, GNU extension) 
needs about twice the time as TAN for complex types.

This is surprising, since it basically performs the same operations as TAN,
only in a different order.

I would expect COTAN to perform about the same as TAN.