What is code inlining?

Inlining refers to compile-time optimization where a small function of code will be injected into the calling function rather than require a separate call.

What do you mean by inlining in compiler optimization context?

In computing, inline expansion, or inlining, is a manual or compiler optimization that replaces a function call site with the body of the called function. Inlining is an important optimization, but has complicated effects on performance.

What does it mean for the compiler to inline method calls?

An inline function is one for which the compiler copies the code from the function definition directly into the code of the calling function rather than creating a separate set of instructions in memory. This eliminates call-linkage overhead and can expose significant optimization opportunities.

What is method inlining?

In essence, method inlining is when the compiler decides to replace your function call with the body of the function. The compiler does this to save the overhead of actually making a function call, which would involve pushing each parameter on to the stack, function prologue, function epilogue, etc. .

What is the process of inlining and how is it accomplished in Java?

Inlining is an optimization performed by the Java Just-In-Time compiler. The compiler does this to save the overhead of actually making a function call, which would involve pushing each parameter on to the stack. This can clearly only be done for non-virtual functions.

When might a compiler choose not to inline an function declared as inline?

The compiler can’t inline a function if: The function or its caller is compiled with /Ob0 (the default option for debug builds). The function and the caller use different types of exception handling (C++ exception handling in one, structured exception handling in the other).

How does compiler decide?

When you call an overloaded function (when there are many functions with same name), the compiler determines the most appropriate definition to use by comparing the argument types used to call the function with the parameter types specified in the definitions.

What is inlining in C#?

Inlining is the process by which code is copied from one function (the inlinee) directly into the body of another function (the inliner). The reason for this is to save the overhead of a method call and the associated work that needs to be done when control is passed from one method to another.

When inline method should not be used?

When we should avoid the use of inline? We should not use functions that are I/O bound as inline functions. When large code is used in some function, then we should avoid the inline. When recursion is used, inline function may not work properly.

Why is it not recommended to use inline functions?

A reason not to use inline is that some debuggers won’t allow you to set a break point or step into an inlined function. – Rob deFriesse Dec 19 ’09 at 15:11

What is the “real” inline decision maker?

There is one heuristic in particular called “callgraph decision” which is what I consider the “real” inline decision maker. It is where all of the benefit estimating code around constant parameters described above is implemented.

Can you replay inline decisions made for callees?

A compiler which inlines post-optimized code (here, a version of g which already has h inlined into it) implicitly “replay” inline decisions made for callees. We feel this is a strength, as it might not necessarily be best to replay the same inline decisions in each context.

What is an example of inline in C++?

Inline Redux Effective C++ – Item 33: Use inlining judiciously EDIT: Bjarne Stroustrup, The C++ Programming Language: A function can be defined to be inline. For example: inline int fac(int n) { return (n < 2)? 1 : n * fac(n-1); }