Can C# properties make the program run slower?

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I'm concerned of people always using getter-setter pattern:

    public int MyVariable { get; private set; }

    public void SomeFunction(){
        MyVariable = 10;
    }

Which as far as I understand compiles to something like:

    private int myVariable;

    public int GetMyVariable(){
        return myVariable;
    }

    private void SetMyVariable(int value){
        myVariable = value;
    }

    public void SomeFunction()
    {
        SetMyVariable(10);
    }

Doesn't it impact the program's performance if used frequently? Isn't it better to do like that:

    private int myVariable;
    public int MyVariable { get {return myVariable; } }

    public void SomeFunction(){
        myVariable = 10;
    }

First off, this type of optimization is typically counter productive - trying to optimize out single method calls is something that will typically have no impact in any real world, measured performance. You're likely better off focusing your efforts on optimizing the algorithms you use at a higher level, and not micro-optimizing the language features used.

Doesn't it impact the program's performance if used frequently? Isn't it better to do like that:

No. This will be effectively the same once compiled.

In addition, in a release build, the JIT compiler will typically completely optimize away the get and set methods, inlining them completely. This will effectively make it perform exactly like using a public field, and have the same performance as a direct member access.

Reflection: Is using reflection still "bad" or "slow"? What has changed , Before you can invoke a field/property/method via reflection you have to get the class Program { private int TestField1; private string TestField2; private static string TestField3; private int If you run it you would get the following exception: System. Improving Reflection Performance with Delegates � C#. C#7.2 introduced the Span type, which enables type-safe access to contiguous regions of memory. New features and types like the ones above aren’t likely to be used by the majority of C# developers, but they definitely can make an impact on performance-critical applications and are worth learning more about. C# Performance matters!

Its the same thing when it's compiled.

For proof you can check out this link. Here is an excerpt from it:

Notice how the get and set accessors in Listing 10-5 do not have implementations. In an auto-implemented property, the C# compiler creates the backing store field behind the scenes, giving the same logic that exists with traditional properties, but saving you from having to use all of the syntax of the traditional property.

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It depends on the compiler. Yes, it may impact the performance. For example, if you are developing a game with Unity Engine properties will be likely not converted to fields automatically, you can inspect produced IL2CPP code and find their C++ wrappers. So, you can win a little if you will use fields instead in render and physics loops. If you have huge amount of such properties access you probably will not find any of them alone in profiler so it will be hard to optimise in the future if all your huge codebase has a lot of properties in critical places because their impact will be distributed evenly. So, I prefer to make things more optimal in critical places right in the development time not delaying them to profiling times. But it is OK to have properties in less critical places.

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C# Performance tips and tricks � Raygun Blog, NET performance, and make your apps as efficient and optimized as possible. The sample application used in this article can be found on GitHub. that this particular request has a risk of running as slow as 2.2 seconds on the first Span in C# 7.2, we now have a tool for improving some of these string� This tutorial describes 10 of the most common C# programming mistakes made, or problems to be avoided, by C# programmers and provide them with help. While most of the mistakes discussed in this article are C# specific, some are also relevant to other languages that target the CLR or make use of the Framework Class Library (FCL).

.NET Performance Optimization: Everything You Need To Know, The drive location of your Visual Studio solutions does not seem to matter as much. Additionally, do not run your solution from a USB drive. Copy� The point of Amdahl's law is that in any program (in any algorithm) there is always a percentage that can not be run in parallel (the sequential portion) and there is another percentage that can be run in parallel (the parallel portion) [Obviously these two portions add up to 100%]. This portions can be expressed as a percentage of execution time.

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Comments
  • I highly doubt this is the area where you will have your primary performance problem in a real-world application.
  • Measure it. It's better than guessing.
  • Whhoooaaa... is this my old manager? He told our team that if he ever saw any of those get/set things in our code, he would fire us. True Story.
  • @MetroSmurf Those types of managers just make good developers leave ;)
  • What the C# compiler does with the property doesn't matter. The code that runs on your machine is vastly different. Check this answer: stackoverflow.com/a/4045073/17034
  • Exactly. Using get and set is the best policy, even if they are just mindless return xxx and this.xxx = value statements. The point is that if you ever need to change the behavior/validation of these settings, you can do it in one place (in the get/set) instead of every place you access it. Can you imagine for some property used in 100+ locations needing to be "checked for bounds" without doing that at the property level? Ugh.