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    <p>It could increase the size of the executable, and I don't think compilers will always actually make them inline even though you used the inline keyword. (Or is it the other way around, like what <a href="https://stackoverflow.com/questions/60830/what-is-wrong-with-using-inline-functions#60833">Vaibhav</a> said?...)</p> <p>I think it's usually OK if the function has only 1 or 2 statements.</p> <p><strong>Edit:</strong> Here's what the linux <a href="http://lxr.linux.no/linux/Documentation/CodingStyle" rel="nofollow noreferrer">CodingStyle</a> document says about it:</p> <blockquote> <p>Chapter 15: The inline disease</p> <p>There appears to be a common misperception that gcc has a magic "make me faster" speedup option called "inline". While the use of inlines can be appropriate (for example as a means of replacing macros, see Chapter 12), it very often is not. Abundant use of the inline keyword leads to a much bigger kernel, which in turn slows the system as a whole down, due to a bigger icache footprint for the CPU and simply because there is less memory available for the pagecache. Just think about it; a pagecache miss causes a disk seek, which easily takes 5 miliseconds. There are a LOT of cpu cycles that can go into these 5 miliseconds.</p> <p>A reasonable rule of thumb is to not put inline at functions that have more than 3 lines of code in them. An exception to this rule are the cases where a parameter is known to be a compiletime constant, and as a result of this constantness you <em>know</em> the compiler will be able to optimize most of your function away at compile time. For a good example of this later case, see the kmalloc() inline function.</p> <p>Often people argue that adding inline to functions that are static and used only once is always a win since there is no space tradeoff. While this is technically correct, gcc is capable of inlining these automatically without help, and the maintenance issue of removing the inline when a second user appears outweighs the potential value of the hint that tells gcc to do something it would have done anyway.</p> </blockquote>
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    1. POWhat is wrong with using inline functions?
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    1. USJeremy Ruten
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    1. COIn VC++ it will increase the size, not sure about other compilers. But if they do chose to make it inline I'm sure it would make it larger too.
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      1. USBrian R. Bondy
    2. COby they I mean the compiler in question.
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      1. USBrian R. Bondy
    3. COYes, the size increment was the major one i heard of.. curious to know if there are more!
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      1. USprakash
 

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