C++ compile time (again, take 2)

[Wolfgang Bangerth]

> --enable-checking can add a lot of overhead.  Please compare
> apples-to-apples; not a raisin (2.95 without --enable-checking) to a
> grape (anything later with --enable-checking).  If you are going to
> rant mainly about compiler slow down, then it is only fair to do so.

That is fair criticism. Here are the results without checking enabled, for all 
compilers (times with --enable-checking in parenthesis):

  2.95    :  46 min
  mainline:  73 min    (89 min)
  tree-ssa:  94 min   (118 min)

In other words, the fact that tree-ssa is roughly 30% slower is unaffected by 
en/disable-checking :-(

W.

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Wolfgang Bangerth              email:            bangerth@ices.utexas.edu
                               www: http://www.ices.utexas.edu/~bangerth/