57  vi ltwerp.cc 
   58  g++ -O2 -D"NDEBUG" -DOPT_NEVER_LOCAL=false  ltwerp.cc lprims.cc -o a2.out
   59  ./a2.out [012]*.l fib.l "(say (sys-times '(fib (peano '19))))" 2>/dev/null  | dd count=1
   60  rm a*.out 
   61  make opt
   62  ./a2.out [012]*.l fib.l "(say (sys-times '(fib (peano '19))))" 2>/dev/null  | dd count=1
   63  bc
   64  history 9
   65  history 9 > History.2