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Delphi High Performance

You're reading from   Delphi High Performance Build fast Delphi applications using concurrency, parallel programming and memory management

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Product type Paperback
Published in Feb 2018
Publisher Packt
ISBN-13 9781788625456
Length 336 pages
Edition 1st Edition
Languages
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Author (1):
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Primož Gabrijelčič Primož Gabrijelčič
Author Profile Icon Primož Gabrijelčič
Primož Gabrijelčič
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Table of Contents (11) Chapters Close

Preface 1. About Performance 2. Fixing the Algorithm FREE CHAPTER 3. Fine-Tuning the Code 4. Memory Management 5. Getting Started with the Parallel World 6. Working with Parallel Tools 7. Exploring Parallel Practices 8. Using External Libraries 9. Best Practices 10. Other Books You May Enjoy

FastMM internals

To get a full speed out of anything, you have to understand how it works and memory managers are no exception to this rule. To write very fast Delphi applications, you should therefore understand how Delphi's default memory manager works.

FastMM is not just a memory manager—it is three memory managers in one! It contains three significantly different subsystems—small block allocator, medium block allocator, and large block allocator.

The first one, the allocator for small blocks, handles all memory blocks smaller than 2,5 KB. This boundary was determined by observing existing applications. As it turned out, in most Delphi applications, this covers 99% of all memory allocations. This is not surprising, as in most Delphi applications most memory is allocated when an application creates and destroys objects and works with arrays and strings, and...

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