tailieunhanh - Lập trình Wrox Professional Xcode 3 cho Mac OS part 68

Tìm hiểu thêm về cá mập Điều này chỉ giới thiệu về cá mập vết trầy xước bề mặt của nó. Đầy đủ tài liệu cho cá mập có sẵn trong ứng dụng chính nó trong trình đơn Help. Có một của người sử dụng hướng dẫn, ling thông thạo và hướng dẫn khai thác dữ liệu, cũng như xử lý tài liệu tham khảo hướng dẫn tương tác. | Instruments 525 Learn More About Shark This introduction to Shark only scratches its surface. Full documentation for Shark is available within the application itself in the Help menu. There is a user s guide profiling and data mining tutorials as well as interactive processor instruction references. Shark can analyze multiple processes and applications that are no longer responding. You can start and stop its sampling from within your application the keyboard or using command-line tools. It can debug memory bandwidth issues processor cache hits and virtual memory paging. Read the documentation for a complete description of all of these features. If you still have questions consider joining the Performance Analysis and Optimization mailing list PerfOptimization-dev at http . INSTRUMENTS Instruments is an application for doing performance analysis. Instruments replaces a hodgepodge collection of older utilities Sampler Big Top Spin Control ObjectAlloc Thread Viewer and others with a uniform flexible and coordinated set of modular testing tools. Using Instruments you can quickly assemble a custom set of analysis modules that will target and hopefully illuminate exactly the problem you re trying to solve. To use Instruments you assemble a deck of customized data collection modules called instruments that gather information about your application the entire system or both. The arrangement as shown in Figure 19-8 comes out looking something like Garage Band. Each track records a different aspect of your application or the system. You can examine the details of an individual track correlate different tracks replay your application s performance compare the performance of different runs and much more. FIGURE 19-8 Download at 526 I CHAPTER 19 PERFORMANCE ANALYSIS The Instruments User Guide is quite good. You can find it by searching for Instruments in the Xcode documentation or online at http mac library documentation .

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