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Full Discussion: Function pointer to inline function ?
Top Forums Programming Function pointer to inline function ? Post 302356995 by Corona688 on Monday 28th of September 2009 11:18:48 AM
Old 09-28-2009
Quote:
Originally Posted by emitrax
The point is that the function is called _VERY_ often, so the more is optimized, the better.
There's almost nothing there to optimize. At best the difference will be minimal, at worst you'll make it slower. If the compiler can inline htons(), it'll become perhaps one branch-instruction optionally skipping one to three instructions that do the byte swap. That's likely fewer instructions than it takes to call a function, let alone run the code inside it. (and if it's not inlining, that's something you could do...) Function calls can be expensive.
 

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LEARN ABOUT MINIX

isalist

isalist(1)                                                         User Commands                                                        isalist(1)

NAME

       isalist - display the native instruction sets executable on this platform

SYNOPSIS

       isalist

DESCRIPTION

       isalist  prints  the names of the native instruction sets executable on this platform on the standard output, as returned by the SI_ISALIST
       command of  sysinfo(2).

       The names are space-separated and are ordered in the sense of best performance. That is, earlier-named instruction sets  may  contain  more
       instructions  than  later-named  instruction  sets;  a  program that is compiled for an earlier-named instruction sets will most likely run
       faster on this machine than the same program compiled for a later-named instruction set.

       Programs compiled for instruction sets that do not appear in the list will most likely experience performance degradation or not run at all
       on this machine.

       The  instruction  set  names  known to the system are listed in  isalist(5).  These names may or may not match predefined names or compiler
       options in the C language compilation system,

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       |Availability                 |SUNWcsu                      |
       +-----------------------------+-----------------------------+

SEE ALSO

       optisa(1), uname(1), sysinfo(2), attributes(5), isalist(5)

SunOS 5.10                                                          25 Jul 1997                                                         isalist(1)
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