Delphi High Performance电子书

Title Page

Copyright and Credits

Delphi High Performance

Packt Upsell

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PacktPub.com

Contributors

About the author

About the reviewers

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Preface

Who this book is for

What this book covers

To get the most out of this book

Download the example code files

Conventions used

Get in touch

Reviews

About Performance

What is performance?

Different types of speed

Algorithm complexity

Big O and Delphi data structures

Data structures in practice

Mr. Smith's first program

Looking at code through the Big O eyes

Don't guess, measure!

Profiling with TStopwatch

Profilers

AsmProfiler

Sampling Profiler

AQTime

Nexus Quality Suite

Summary

Fixing the Algorithm

Responsive user interfaces

Updating a progress bar

Bulk updates

Virtual display

Caching

Dynamic cache

Speeding up SlowCode

Summary

Fine-Tuning the Code

Delphi compiler settings

Code inlining control

Optimization

Record field alignment

Assertions

Overflow checking

Range checking

Extracting common expressions

The helpful CPU window

Behind the scenes

A plethora of types

Simple types

Strings

Arrays

Records

Classes

Interfaces

Optimizing method calls

Parameter passing

Method inlining

The magic of pointers

Going the assembler way

Returning to SlowCode

Summary

Memory Management

Optimizing strings and array allocations

Memory management functions

Dynamic record allocation

FastMM internals

Memory allocation in a parallel world

Replacing the default memory manager

ScaleMM

TBBMalloc

Fine-tuning SlowCode

Summary

Getting Started with the Parallel World

Processes and threads

When to parallelize the code?

Most common problems

Never access UI from a background thread

Simultaneous reading and writing

Sharing a variable

Synchronization

Critical sections

Other locking mechanisms

A short note on coding style

Shared data with built-in locking

Interlocked operations

Object life cycle

Communication

Windows messages

Synchronize and Queue

Polling

Performance

Third-party libraries

Summary

Working with Parallel Tools

TThread

Advanced TThread

Setting up a communication channel

Sending messages from a thread

Implementing a timer

Summary

Exploring Parallel Practices

Tasks and patterns

Variable capturing

Tasks

Exceptions in tasks

Parallelizing a loop

Thread pooling

Async/Await

Join

Join/Await

Future

Parallel for

Pipelines

Creating the pipeline

Stages

Displaying the result and shutting down

Summary

Using External Libraries

Using object files

Object file formats

Object file linking in practice

Using C++ libraries

Using a proxy DLL in Delphi

Summary

Best Practices

About performance

Fixing the algorithm

Fine-tuning the code

Memory management

Getting started with the parallel world

Working with parallel tools

Exploring parallel practices

Using external libraries

Final words

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