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Fixing the Algorithm

In the previous chapter, we explored the concept of performance and looked at different scenarios where we would like to make the program faster. The previous chapter was largely theoretical, but now is the time to look at it in a more practical way.

There are two main approaches to speeding up a program:

Replace the algorithm with a better one.
Fine-tune the code so that it runs faster.

I spent lots of time in the previous chapter discussing the time complexity simply to make it clear that a difference between two algorithms can result in impressive speed-up. It can be much more than a simple constant factor (such as a 10-times speed-up). If we go from an algorithm with bad time complexity (say, O(n²)) to an algorithm with a better behavior (O(n log n), for example), then the difference in speed becomes more and more noticeable when we increase...

Key benefits

Build efficient and concurrent applications in Delphi with focused examples

Identify performance bottlenecks and apply the correct algorithm to increase the performance of applications.

Delve into parallel programming and memory management to optimize your code

Description

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.

What you will learn

Find performance bottlenecks and easily mitigate them

Discover different approaches to fix algorithms

Understand parallel programming and work with various tools included with Delphi

Master the RTL for code optimization

Explore memory managers and their implementation

Leverage external libraries to write better performing programs

What do you get with Print?

Instant access to your digital eBook copy whilst your Print order is Shipped

Paperback book shipped to your preferred address

Download this book in EPUB and PDF formats

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O. Beltrami Mar 30, 2019

I have been using Delphi since 1995 and pride myself as knowing a lot of what goes on "under the hood". But this book was a sobering serving of humble pie. Great narrative, excellent and concise examples, and lots of real-life testing data to back-up the assertions of the text. This book will join the barely dated "Delphi XE2 Foundations" (Rollinson) as a permanent fixture on my desk (where, believe me, space is at a premium).

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Dany Marmur Mar 21, 2018

I am completely in AWE of Primoz new book "Delphi High Performance". After reading only 4 chapters i have already produced two tickets for two different 3rd party vendors and the bugs are already fixed. Most literature in lieu leaves me with a "well, i knew that". But this book is really an eye-opener to me.You get walked-through all those things that are a bit murky. Important and interesting details regarding the subject matter explained with humour, exactness and detail. Also - and i appreciate this a lot - the authors personal views on some particular details is accounted for. This is not a beginners book, put it in the hands of someone without hands-on experience and they will probably go do a LOT of premature optimization.

Alberto Oct 08, 2019

Very well written. It contains a lot of useful info and it cannot be clearer than this; you can understand everything thanks to the skills of the author! He is able to explain quite complex topics with an easy wording and well-chosen examples

Vincent Parrett Mar 07, 2018

A new Delphi book is a rare thing these days, and this is a good one. I'm always tweaking my code to optimise performance, so this was right up my alley.While it covers a lot of things I already knew, there was also plenty I didn't know (and I've been using delphi since v1) or had forgotten. The book goes into just the right amount of detail, with excellent examples.Should be required reading for all Delphi developers!

Jim A. McKeeth Apr 06, 2018

Primož is the ideal author to write this book, and he assembled the kind of resource we all need to read.I appreciate that it talks both about responsiveness and computation performance. It is also refreshing to see a book that is written with attention paid to the latest technology, while also being applicable to earlier versions of Delphi.I've been programming Delphi since the beginning, and Turbo Pascal before that, and just flipping through this book I learned useful information.

Delphi High Performance: Build fast Delphi applications using concurrency, parallel programming and memory management

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Delphi High Performance

Fixing the Algorithm

Responsive user interfaces

Caching

Speeding up SlowCode

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Delphi High Performance: Build fast Delphi applications using concurrency, parallel programming and memory management

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