Modern C# and .NET Tutorial: Cross-Platform Basics/

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Using Multiple Threads with Parallel LINQ

Learn about parallel LINQ and multiple threads to execute LINQ queries for improved performance.

We'll cover the following...

Creating an app that benefits from multiple threads

By default, only one thread is used to execute a LINQ query. Parallel LINQ (PLINQ) is an easy way to enable multiple threads to execute a LINQ query.

Note: Do not assume that using parallel threads will improve the performance of applications. Always measure real-world timings and resource usage.

Creating an app that benefits from multiple threads

To see it in action, we will start with some code that only uses a single thread to calculate Fibonacci numbers for 45 integers. We will use the StopWatch type to measure the change in performance. We will use operating system tools to monitor the CPU and CPU core usage. This exercise won’t show much if we do not have multiple CPUs or at least multiple cores.

Step 1: Use your preferred code editor to add a new Console App or console project named LinqInParallel to the Chapter11 solution or workspace. ...

Introduction

Hello, C#! Welcome, .NET!

Speaking C#

Controlling Flow, Converting Types, and Handling Exception

Writing, Debugging, and Testing Functions

Building Your Own Types with Object-Oriented Programming

Implementing Interfaces and Inheriting Classes

Packaging and Distributing .NET Types

Working with Common .NET Types

Working with Files, Streams, and Serialization

Working with Data Using Entity Framework Core

Querying and Manipulating Data Using LINQ

Introducing Web Development Using ASP.NET Core

Building Websites Using ASP.NET Core Razor Pages

Building Websites Using the Model-View-Controller Pattern

Building and Consuming Web Services

Building User Interfaces Using Blazor

Conclusion

Using Multiple Threads with Parallel LINQ

Creating an app that benefits from multiple threads