November 2013
Intermediate to advanced
576 pages
19h 3m
English
book
iOS Components and Frameworks: Understanding the Advanced Features of the iOS SDK
by Kyle Richter, Joe Keeley
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17. Grand Central Dispatch for Performance
Many apps have challenging performance requirements, involving multiple processor-intensive and high-latency tasks that need to take place simultaneously. This chapter demonstrates the negative effects of blocking the main queue, which makes the user interface slow or completely unusable—not at all desirable for a good user experience. It then examines tools supported by iOS that allow the programmer to perform tasks “in the background,” meaning that a processing task will take place and not directly delay updating the user interface. Apple provides several tools with varying degrees of control over how background tasks are accomplished.
Concurrent programming is frequently done using threads. It can ...
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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.