Book Image

Delphi High Performance

By : Primož Gabrijelčič
Book Image

Delphi High Performance

By: Primož Gabrijelčič

Overview of this book

Delphi is a cross-platform Integrated Development Environment (IDE) that supports rapid application development for Microsoft Windows, Apple Mac OS X, Google Android, iOS, and now Linux with RAD Studio 10.2. This book will be your guide to build efficient high performance applications with Delphi. The book begins by explaining how to find performance bottlenecks and apply the correct algorithm to fix them. It will teach you how to improve your algorithms before taking you through parallel programming. You’ll then explore various tools to build highly concurrent applications. After that, you’ll delve into improving the performance of your code and master cross-platform RTL improvements. Finally, we’ll go through memory management with Delphi and you’ll see how to leverage several external libraries to write better performing programs. By the end of the book, you’ll have the knowledge to create high performance applications with Delphi.
Table of Contents (16 chapters)
Title Page
Copyright and Credits
Packt Upsell


Tasks are powerful but clumsy. The real power of modern multithreading libraries comes not from them, but from specialized code designed to solve specific usage patterns (pattern or a parallel pattern for short). Although I intend to cover all of the patterns implemented in the Parallel Programming Library, I'll start with a pattern you won't find there.

The Async/Await pattern comes from .NET. It allows you to start a background task (async) and execute some code in the main thread after the task completes its work (await). In Delphi, we cannot repeat the incredible usefulness of the .NET syntax, as it requires support from the compiler, but we can approximate it with something that is useful enough. Such an implementation can be found in my OmniThreadLibrary. For the purpose of this book, I have re-implemented it in the unit DHPThreading, which you can freely use in your code.

The AsyncAwait demo shows when this pattern can be useful and how to use it. The Long task button calls...