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

Fine-tuning the code

When the algorithm is as perfect as it can get, and the program is still not running fast enough, it is time to fine-tune the code. In a process we call optimization, we can change the Delphi code so that it will execute in less time, or we can convert it to assembler code. The latter option should be used sparingly, as assembler code is hard to maintain; it also prevents us from compiling to multiple platforms. The last option, which I discussed in Chapter 8, Using External Libraries, is to replace the code with an external library.

As a first step in fine-tuning the code, you should always check the compiler settings. The most important setting is probably Optimization, which can sometimes make a big difference. My recommendation, however, is to disable optimization in the DEBUG version and enable it for RELEASE. Disabling optimization can make a big improvement in the debugging experience.

Another setting that makes a big difference is Range checking. Disabling range...