optimization/3987: propagate_freq enormous performance hit in 3.1

[bangerth@dealii.org]

Synopsis: propagate_freq enormous performance hit in 3.1

State-Changed-From-To: open->feedback
State-Changed-By: bangerth
State-Changed-When: Sat Mar 15 04:14:13 2003
State-Changed-Why:
    Brad, is this report still imminent? If so, then it would
    classify as a regression, and we should mark it as that.
    Unfortunately, I don't have access to such a machine...
    
    W.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=3987