Performance tuning is the
process of refining a program to make it run faster. Many of the
techniques described in this chapter are general techniques that
work for any program running on any system. Other techniques are
specific to floating-point applications running on HP 9000 systems.
We do not discuss input/output efficiency, which often has the most
dramatic impact on a program's execution speed. Keep in
mind that some performance tuning techniques carry a price—they
may make the program less portable or less easy to understand and
maintain. You should weigh these pros and cons before making major
changes to your program.
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