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Measuring Method Performance in C# Web API

This project demonstrates how to measure the performance of API endpoints in a .NET 8 Web API using two different approaches:

1. Manual measurement using Stopwatch.
2. Automated method measurement using the MethodTimer.Fody library.

Project Overview

Endpoints:

• GET /WeatherForecast/simple: Measures the performance manually using Stopwatch and logs the elapsed time to the console.

• GET /WeatherForecast/fody: Uses the MethodTimer.Fody library to automatically log the performance time to the debug window.

Both endpoints simulate a long-running operation and return a weather forecast for the next 5 days.

Key Concepts:

• Stopwatch: Manually starts and stops to measure elapsed time.
• MethodTimer.Fody: Automatically tracks and logs the execution time of any decorated method (marked with [Time] attribute).

Running the Project

Prerequisites:

• .NET 8 SDK
• Visual Studio or any preferred C# IDE

Steps:

1. Clone or download the project.
2. Restore the NuGet packages:

   dotnet restore

3. Run the application:

   dotnet run

Swagger UI:

Once the project is running, Swagger will be available at:

http://localhost:<port>/swagger

This UI allows you to test the API endpoints easily.

Measuring Performance:

1. For /WeatherForecast/simple:

   • Call the endpoint via Swagger or directly using a tool like Postman.
   • Observe the performance logs in the console window. The elapsed time in milliseconds will be printed using Stopwatch.

2. For /WeatherForecast/fody:

   • Call the endpoint via Swagger or Postman.
   • Check the debug window (Output window in Visual Studio) for the performance logs, which are automatically logged by the MethodTimer.Fody library.

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