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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

Memory Management

In the previous chapter, I explained a few things with a lot of hand-waving. I was talking about memory being allocated but I never told what that actually means. Now is the time to fill in the missing pieces.

Memory management is part of practically every computing system. Multiple programs must coexist inside a limited memory space, and that can only be possible if the operating system is taking care of it. When a program needs some memory, for example, to create an object, it can ask the operating system and it will give it a slice of shared memory. When an object is not needed anymore, that memory can be returned to the loving care of the operating system.

Slicing and dicing memory straight from the operating system is a relatively slow operation. In lots of cases, a memory system also doesn't know how to return small chunks of memory. For example...

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