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34 C and C++ Source-Level Optimizations Chapter 2
25112 Rev. 3.06 September 2005
Software Optimization Guide for AMD64 Processors
2.15 Local Static Functions
Optimization
Declare as static functions that are not used outside the file where they are defined.
Application
This optimization applies to:
• 32-bit software
• 64-bit software
Rationale
Declaring a function as static forces internal linkage. Functions that are not declared as static
default to external linkage, which may inhibit certain optimizations—for example, aggressive
inlining—with some compilers.