# create the directory ./profdata if it does not already exist, and delete its
# contents if it does exist. Then compile with -prof_gen, and run the
# create the directory ./profdata if it does not already exist, and delete its
# contents if it does exist. Then compile with -prof_gen, and run the
# wait 15 minutes for the benchmark to complete). Then do a 'make clean', and
# recompile with -prof_use.
# wait 15 minutes for the benchmark to complete). Then do a 'make clean', and
# recompile with -prof_use.