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This article will explain in detail how to use inline functions in C#. The editor thinks it is very practical, so I share it for you as a reference. I hope you can get something after reading this article.

There is an inline function in C++ that uses inline to modify the function, and the compiler optimizes it and inserts the function into the call as a code judgment.

When a function call is executed, it is necessary to first allocate storage space for formal parameters and local variables in the stack, then copy the value of the argument to the formal parameter, and then put the return address of the function (which indicates where the program should go back to continue execution) on the stack, and finally jump to the internal execution of the function. This process takes time.

In addition, when the function returns from the return statement, it needs to recover the storage space occupied by formal parameters and local variables from the stack, then take the return address from the stack, and then jump to that address to continue execution, which will also take time.

In C #, you can tell the compiler to optimize it by using features on the function to achieve the same goal.

[MethodImpl (MethodImplOptions.AggressiveInlining)]

Examples are as follows:

Using System;using System.Diagnostics;using System.Runtime.CompilerServices;class Program {const int _ max = 100000000; static void Main () {int sum = 0; Stopwatch S1 = Stopwatch.StartNew (); for (int I = 0; I < _ max; iTunes +) {sum + = Method1 ();} s1.Stop (); Stopwatch S2 = Stopwatch.StartNew () For (int I = 0; I < _ max; iTunes +) {sum + = Method2 ();} s2.Stop (); Console.WriteLine (double) (s1.Elapsed.TotalMilliseconds * 1000000) / _ max) .ToString ("0.00 ns")) Console.WriteLine ((double) (s2.Elapsed.TotalMilliseconds * 1000000) / _ max) .ToString ("0.00 ns")); Console.Read () } static int Method1 () {return "one" .length + "two" .length + "three" .length + "four" .length + "five" .length + "six" .length + "seven" .length + "eight" .length + "nine" .length + "ten" .length } [MethodImpl (MethodImplOptions.AggressiveInlining)] static int Method2 () {return "one" .length + "two" .length + "three" .length + "four" .length + "five" .length + "six" .length + "seven" .Le ngth + "eight" .length + "nine" .length + "ten" .length;}}

Test results:

21.92 ns3.22 ns about "how to use inline functions in C#" is shared here. I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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