What is .NET Runtime Optimization Service and why does this process appear in multiple process and eating my CPU and RAM?

.NET Runtime Optimization Service is a Windows service that is responsible for optimizing the performance of .NET applications. It is a part of the .NET Framework and is designed to improve the startup time of .NET applications by precompiling them. This service runs in the background and is responsible for compiling .NET assemblies into native code, which can be executed by the CPU.

The reason why this process appears in multiple processes and eats up your CPU and RAM is that it is a resource-intensive process. When you install a new version of the .NET Framework or update an existing one, the .NET Runtime Optimization Service will start to optimize the performance of the .NET applications on your system. This process can take some time, and during this time, it may consume a significant amount of CPU and RAM.

If you are experiencing performance issues due to the .NET Runtime Optimization Service, there are a few things you can do to fix the problem:

1. Wait for the process to complete: The .NET Runtime Optimization Service is a necessary process, and it is important to let it complete its work. If you are experiencing performance issues, it may be because the process is still running. Wait for it to complete, and your system should return to normal.

2. Disable the service: If you do not want the .NET Runtime Optimization Service to run on your system, you can disable it. To do this, open the Services app, locate the .NET Runtime Optimization Service, and set its startup type to Disabled.

3. Limit the CPU usage: If you want to limit the amount of CPU that the .NET Runtime Optimization Service can use, you can do so by setting the CPU affinity for the process. To do this, open the Task Manager, locate the process, right-click on it, and select Set Affinity. From there, you can select the number of CPUs that the process can use.

In conclusion, the .NET Runtime Optimization Service is an important process that is responsible for optimizing the performance of .NET applications. While it may consume a significant amount of CPU and RAM, it is necessary for the proper functioning of your system. If you are experiencing performance issues, try waiting for the process to complete, disabling the service, or limiting the CPU usage.ConclusionIn summary, the .NET Runtime Optimization Service is a crucial process for optimizing the performance of .NET applications. While it may cause temporary performance issues, it is important to let it complete its work. If you still experience problems, you can disable the service or limit its CPU usage. By doing so, you can ensure that your system runs smoothly while still benefiting from the optimizations provided by this service.

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