Book Image

Unity Game Optimization - Third Edition

By : Dr. Davide Aversa, Chris Dickinson
Book Image

Unity Game Optimization - Third Edition

By: Dr. Davide Aversa, Chris Dickinson

Overview of this book

Unity engine comes with a great set of features to help you build high-performance games. This Unity book is your guide to optimizing various aspects of your game development, from game characters and scripts, right through to animations. You’ll explore techniques for writing better game scripts and learn how to optimize a game using Unity technologies such as ECS and the Burst compiler. The book will also help you manage third-party tooling used with the Unity ecosystem. You’ll also focus on the problems in the performance of large games and virtual reality (VR) projects in Unity, gaining insights into detecting performance issues and performing root cause analysis. As you progress, you’ll discover best practices for your Unity C# script code and get to grips with usage patterns. Later, you’ll be able to optimize audio resources and texture files, along with effectively storing and using resource files. You’ll then delve into the Rendering Pipeline and learn how to identify performance problems in the pipeline. In addition to this, you’ll learn how to optimize the memory and processing unit of Unity. Finally, you’ll cover tips and tricks used by Unity professionals to improve the project workflow. By the end of this book, you’ll have developed the skills you need to build interactive games using Unity and its components.
Table of Contents (15 chapters)
Free Chapter
Section 1: Base Scripting Optimization
Section 2: Graphical Optimizations
Section 3: Advance Optimizations

Update, coroutines, and InvokeRepeating

Another habit that's easy to fall into is to call something repeatedly in an Update() callback way more often than is needed. For example, we may start with a situation like this:

void Update() {

In this case, we're calling some custom ProcessAI() subroutine every single frame. This may be a complex task, requiring the AI system to check some grid system to figure out where it's meant to move or determine some fleet maneuvers for a group of spaceships or whatever our game needs for its AI.

If this activity is eating into our frame rate budget too much, and the task can be completed less frequently than every frame with no significant drawbacks, then a good trick to improve performance is to simply reduce the frequency at which that ProcessAI() gets called:

private float _aiProcessDelay = 0.2f;
private float _timer...