April 2006
Beginner
623 pages
17h 3m
English
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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.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.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.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.
Chapter 16. Performance Analysis
Whether it's a rollercoaster ride or a visit to the dentist, a lot of times you just want things to go faster—and the applications you build with Xcode are no exception. Speeding up an application entails finding and eliminating inefficient code, making better use of the computer's resources, or just thinking differently. Neither Xcode nor I can help you with the last one. Sometimes the most dramatic improvements in a program are those that come from completely rethinking the problem. There are, sadly, no developer tools to simulate your creativity.
The more mundane approaches are to reduce the amount of wasted effort your application expends and to harness more of the computer system's power. To do that you first need to know where your application is spending its time and learn what resources it's using. In other words, to make your application run faster, you need to know what's slowing it down. This is a process known as performance analysis. And for that, Xcode offers a number of very powerful tools.
Xcode's performance analysis tools are strictly for native binaries and Java. To my knowledge, there are no performance analysis tools for AppleScript.
This chapter covers the four performance analysis tools that you can launch directly from within Xcode: Shark, Sampler, MallocDebug, and ObjectAlloc. The Developers tools CD that you used to install Xcode contains many other specialized tools for helping you identify and optimize your application. There ...
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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.