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

Replacing the default memory manager

While writing a new memory manager is a hard job, installing it in Delphi—once it is completed—is very simple. The System unit implements functions GetMemoryManager and SetMemoryManager that help with that:

  TMemoryManagerEx = record
    {The basic (required) memory manager functionality}
    GetMem: function(Size: NativeInt): Pointer;
    FreeMem: function(P: Pointer): Integer;
    ReallocMem: function(P: Pointer; Size: NativeInt): Pointer;
    {Extended (optional) functionality.}
    AllocMem: function(Size: NativeInt): Pointer;
    RegisterExpectedMemoryLeak: function(P: Pointer): Boolean;
    UnregisterExpectedMemoryLeak: function(P: Pointer): Boolean;

procedure GetMemoryManager(var MemMgrEx: TMemoryManagerEx); overload;
procedure SetMemoryManager(const MemMgrEx: TMemoryManagerEx); overload;

A proper way to install a new memory manager is to call GetMemoryManager and store the result in some global variable. Then, the code should populate...