Book Image

Mastering Delphi Programming: A Complete Reference Guide

By : Primož Gabrijelčič
Book Image

Mastering Delphi Programming: A Complete Reference Guide

By: Primož Gabrijelčič

Overview of this book

Delphi is a cross-platform Integrated Development Environment (IDE) that supports rapid application development for most operating systems, including Microsoft Windows, iOS, and now Linux with RAD Studio 10.2. If you know how to use the features of Delphi, you can easily create scalable applications in no time. This Learning Path begins by explaining how to find performance bottlenecks and apply the correct algorithm to fix them. You'll brush up on tricks, techniques, and best practices to solve common design and architectural challenges. Then, you'll see how to leverage external libraries to write better-performing programs. You'll also learn about the eight most important patterns that'll enable you to develop and improve the interface between items and harmonize shared memories within threads. As you progress, you'll also delve into improving the performance of your code and mastering cross-platform RTL improvements. By the end of this Learning Path, you'll be able to address common design problems and feel confident while building scalable projects. This Learning Path includes content from the following Packt products: Delphi High Performance by Primož Gabrijel?i? Hands-On Design Patterns with Delphi by Primož Gabrijel?i?
Table of Contents (19 chapters)

Thread pool

A thread pool pattern can be simply described as a collection of threads. Some of them may be doing useful work, while others are sitting idle, waiting for you to run any job in them.

To the careful reader of this book, the thread pool pattern would seem like an old acquaintance. After all, it is nothing more than a variation on a object pool pattern, which was discussed in Chapter 10, Singleton, Dependency Injection, Lazy Initialization, and Object Pool.

A thread pool is like a taxi service. When you need to travel somewhere, you call the dispatch and as soon as they have a taxi ready, they will send it to pick you up.

Using a thread pool minimizes the time a background task needs to start up. Creating a thread can take some time (up to ten milliseconds and more on older hardware), which can be a problem in highly optimized, heavily multi-threaded programs...