Routines
One of the most powerful tools in code tuning is a good routine decomposition. Small, well-defined routines save space because they take the place of doing jobs separately in multiple places. They make a program easy to optimize because you can refactor code in one routine and thus improve every routine that calls it. Small routines are relatively easy to rewrite in a low-level language. Long, tortuous routines are hard enough to understand on their own; in a low-level language like assembler, they're impossible.
Cross-Reference
For details on working with routines, see Chapter 7.
Rewrite Routines Inline
In the early days of computer programming, some machines imposed prohibitive performance penalties for calling a routine. A call to a routine ...
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