May 2015
Intermediate to advanced
424 pages
8h 32m
English
Content preview from iOS Swift Game Development Cookbook, 2nd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 15. Performance and Debugging
At some point during its development, every game will have performance issues, and every game will crash. Fortunately, iOS has some of the best tools around for squeezing as much performance as possible out of your games and finding bugs and other issues.
In this chapter, you’ll learn about how to use these tools, how to fix problems, and how to get information about how your game’s behaving.
Improving Your Frame Rate
Problem
You need to coax a better frame rate out of your game so that it plays smoothly.
Solution
To improve your frame rate, you first need to determine where the majority of the work is being done. In Xcode:
- From the Scheme menu, select your device, so that the application will be installed to the device when you build.
Open the Product menu and choose Profile (or press Command-I).
The application will build and install onto the device, and Instruments will open and show the template picker (see Figure 15-1).
- Select the Time Profiler instrument and run your game for a while. You’ll start seeing information about how much CPU time your game is taking up.
- Turn on Invert Call Tree, Hide Missing Symbols, and Hide System Libraries, and turn off everything else in the list, as shown in Figure 15-2.
Take note of the name of the functions that are at the top of the list:
- If the top functions are the method in which you call OpenGL, the game is spending most of its time rendering graphics. To improve your frame rate, reduce the number of ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.