11.5. Profile-Guided or Other Optimizations
Research has shown that binary optimizers can achieve further improvements in performance for programs that run on RISC-like systems. Two types of postcompilation optimizers have been developed.
Static analyzers modify a fully compiled and linked program by performing further examination at the machine code level. Dynamic optimizers collect information while a program is running under its typical load, and then use that feedback information to revise the code and data sections optimally in a refinement phase of compiling and linking. This latter technique is called profile-guided optimization.
Such techniques can be useful in squeezing the maximum performance out of today's hardware systems for very ...
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