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.

Preface

Who this book is for

What this book covers

To get the most out of this book

Free Chapter

Section 1: Base Scripting Optimization

Section 1: Base Scripting Optimization

Evaluating Performance Problems

Evaluating Performance Problems

Gathering profiling data using the Unity Profiler

Best approaches to performance analysis

Final thoughts on profiling and analysis

Scripting Strategies

Scripting Strategies

Obtaining components using the fastest method

Removing empty callback definitions

Caching component references

Sharing calculation output

Update, coroutines, and InvokeRepeating

Faster GameObject null reference checks

Avoid retrieving string properties from GameObjects

Using appropriate data structures

Avoiding re-parenting transforms at runtime

Considering caching transform changes

Avoiding Find() and SendMessage() at runtime

Disabling unused scripts and objects

Using distance-squared over distance

Minimizing deserialization behavior

Loading scenes additively and asynchronously

Creating a custom Update() layer

Section 2: Graphical Optimizations

Section 2: Graphical Optimizations

The Benefits of Batching

The Benefits of Batching

Materials and shaders

The Frame Debugger

Dynamic batching

Static batching

Optimizing Your Art Assets

Optimizing Your Art Assets

Mesh and animation files

Asset bundles and resources

Faster Physics

Understanding the physics engine

Physics performance optimizations

Dynamic Graphics

Dynamic Graphics

Exploring the Rendering Pipeline

Detecting performance issues

Rendering performance enhancements

Section 3: Advance Optimizations

Section 3: Advance Optimizations

Optimizations for Virtual and Augmented Reality

Optimizations for Virtual and Augmented Reality

Overview of XR technology

Developing XR products

Performance enhancements in XR

Masterful Memory Management

Masterful Memory Management

The Mono platform

Code compilation

Profiling memory

Memory management performance enhancements

The Data-Oriented Technology Stack

The Data-Oriented Technology Stack

The problem of multithreading

The Unity Job System

The burst compiler

Tactical Tips and Tricks

Tactical Tips and Tricks

Editor hotkey tips

Custom Editor scripts and menu tips

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Developing XR products

Developing an XR product in Unity involves importing one of several XR software development kits (SDKs) into our Unity project and making some specialized API calls to configure and use the platform at runtime. Each SDK is different in its own way and offers a different set of features. For instance, the Oculus Rift and HTC VIVE SDKs provide APIs to control VR HMDs and their respective controllers, whereas Apple's ARKit provides utilities to determine spatial positioning and superimpose objects on the display. Unity Technologies have been working hard to create APIs that support all of these variations, so the APIs for XR development in Unity have changed a lot over the past few years.

The early days of Unity VR development meant dropping native plugins into our Unity projects, importing SDKs directly from an external developer portal (involving all...