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Delphi High Performance

Delphi High Performance

By : Primož Gabrijelčič
4.8 (9)
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Delphi High Performance

Delphi High Performance

4.8 (9)
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 (11 chapters)
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Fixing the algorithm


My preferred approach to improving performance is—always—fixing the algorithm. Look at it this way—if we need 1 time unit to process one data item, and the algorithm is O(n2), we need 10,000 time units to process an input of size 100. If you fine-tune the code and speed up the operation by 50% (which is an excellent result), the code will need 5000 time units to do the job. If you, however, change the algorithm to O(n log n), it will need in the order of 1000 time units or less. Even if processing one item takes 100% longer than in the original code, the whole process will run in, say, 2000 time units.

Note

An algorithm with lower complexity will beat an algorithm with higher complexity, even if the latter executes its steps faster.

As it's impossible to give one piece of advice that will fix all your problems, Chapter 2Fixing the Algorithm, looked into different user stories. The first topic was about responsive user interfaces. A program's UI can lag or block for different...

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