** Next:** Performance Tables
** Up:** Performance of LAPACK95
** Previous:** Performance of LAPACK95
** Contents**
** Index**

##

Performance Issues

In contrast to Fortran 77 compilers, current
Fortran 95 compilers do
not assume that array storage is contiguous. When a Fortran 77 routine
is called from a Fortran 95 routine, a contiguous copy of arrays is made
in temporary storage, an operation that degrades performance. This problem
could be alleviated by alternative interfaces to the Fortran 77 routines
involving Fortran 77 constructs, but this would violate the goal of
having a true Fortran 95 interface to LAPACK. Hence the user should
be aware that in some cases LAPACK95 may perform less efficiently
than when LAPACK is called directly from a Fortran 77
or Fortran 95 program.

Susan Blackford
2001-08-19