Book Image

Unity 2017 Game Optimization - Second Edition

By : Chris Dickinson
Book Image

Unity 2017 Game Optimization - Second Edition

By: Chris Dickinson

Overview of this book

Unity is an awesome game development engine. Through its massive feature-set and ease-of-use, Unity helps put some of the best processing and rendering technology in the hands of hobbyists and professionals alike. This book shows you how to make your games fly with the recent version of Unity 2017, and demonstrates that high performance does not need to be limited to games with the biggest teams and budgets. Since nothing turns gamers away from a game faster than a poor user-experience, the book starts by explaining how to use the Unity Profiler to detect problems. You will learn how to use stopwatches, timers and logging methods to diagnose the problem. You will then explore techniques to improve performance through better programming practices. Moving on, you will then learn about Unity’s built-in batching processes; when they can be used to improve performance, and their limitations. Next, you will import your art assets using minimal space, CPU and memory at runtime, and discover some underused features and approaches for managing asset data. You will also improve graphics, particle system and shader performance with a series of tips and tricks to make the most of GPU parallel processing. You will then delve into the fundamental layers of the Unity3D engine to discuss some issues that may be difficult to understand without a strong knowledge of its inner-workings. The book also introduces you to the critical performance problems for VR projects and how to tackle them. By the end of the book, you will have learned to improve the development workflow by properly organizing assets and ways to instantiate assets as quickly and waste-free as possible via object pooling.
Table of Contents (17 chapters)
Title Page
About the Author
About the Reviewers
Customer Feedback
Software and Hardware List

Create a custom Update() layer

Earlier in this chapter, in the 

Update, Coroutines and InvokeRepeating

 section, we discussed the relative pros and cons of using these Unity Engine features as a means of avoiding excessive CPU workload during most of our frames. Regardless of which of these approaches we might adopt, there is an additional risk of having lots of MonoBehaviours written to periodically call some function, which is having too many methods triggering in the same frame simultaneously.

Imagine thousands of MonoBehaviours that initialized together at the start of a Scene, each starting a Coroutine at the same time that will process their AI tasks every 500 milliseconds. It is highly likely that they would all trigger within the same frame, causing a huge spike in its CPU usage for a moment, which settles down temporarily and then spikes again a few moments later when the next round of AI processing is due. Ideally, we would want to spread these invocations out over time.

The following...