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Profiling your App
Session 409
Learning Instruments
David M. O’Rourke
Performance Tools Engineering Manager
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What You’ll Learn Today
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What You’ll Learn Today
•Elements of performance
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What You’ll Learn Today
•Elements of performance
•Methodology to improve performance
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What You’ll Learn Today
•Elements of performance
•Methodology to improve performance
•Instruments tour
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What You’ll Learn Today
•Elements of performance
•Methodology to improve performance
•Instruments tour
•iOS App optimization demonstrations
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What Is Performance?
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"Crashes all the time"
"Crashes all the time"
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Performance Is a Feature of Your App
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Performance Is a Feature of Your App
•Xcode to author/build your app
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Performance Is a Feature of Your App
•Xcode to author/build your app
•Interface Builder to design your app
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Performance Is a Feature of Your App
•Xcode to author/build your app
•Interface Builder to design your app
•Instruments to profile your app
■ Optimize performance
■ Reduces crashes and terminations
■ Can improve power usage
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Performance Profile Process
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Debug Process
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Debug Process
Reproduce the problem
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Debug Process
Reproduce the problem
Debug and
inspect logs
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Debug Process
Reproduce the problem
Form a hypothesis
Debug and
inspect logs
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Debug Process
Reproduce the problem
Form a hypothesis
Make a change Debug and
inspect logs
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Debug Process
Reproduce the problem
Form a hypothesis
Make a change Debug and
inspect logs
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Profile Process
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Profile Process
Reproduce the problem
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Profile Process
Reproduce the problem
Profile with tools
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Profile Process
Form a hypothesis
Reproduce the problem
Profile with tools
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Profile Process
Form a hypothesis
Make a change
Reproduce the problem
Profile with tools
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Profile Process
Form a hypothesis
Make a change
Reproduce the problem
Profile with tools
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Where Can I Find Instruments?
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Where Can I Find Instruments?
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How Do I Access Instruments?
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How Do I Access Instruments?
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How Do I Access Instruments?
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How Do I Access Instruments?
•Pro Tip
■ Right-click and choose Keep in Dock
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Instruments Tour
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Document Model and Templates
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Tour
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Tour
Toolbar
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Tour
Strategies
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Tour
Timeline
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Tour
Details
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Tour
Extended
Details
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Toolbar
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Toolbar
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Toolbar
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Toolbar
Target menu
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Toolbar
Target menu
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Toolbar
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Toolbar
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Toolbar
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Toolbar
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Toolbar
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Toolbar
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Timeline
Instrument strategy
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Timeline
Threads strategy
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Timeline
CPU strategy
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Timeline and Filtering
System Trace
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Detail Pane
Call Tree
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Detail Pane
Call Tree
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Detail Pane
Sample List
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Detail Pane
Source code
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Detail Pane
Source code
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Detail Pane
Disassembly
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Detail Pane
System Calls
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Detail Pane
Activity summary
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Instruments
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Demo
Time Profiler example
Joe Grzywacz
Performance Tools Engineering
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Use Call Tree
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Use Call Tree
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Use Thread Strategy
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Use Thread Strategy
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Use CPU Strategy
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Demo
Memory profiling example
Victor Hernandez
Performance Tools Engineering
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Use Cycles and Roots
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Use Allocations
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Use Allocations
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Closing Thoughts…
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Profile Process
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Profile Process
Reproduce the problem
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Profile Process
Reproduce the problem
Profile with tools
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Profile Process
Form a hypothesis
Reproduce the problem
Profile with tools
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Profile Process
Form a hypothesis
Make a change
Reproduce the problem
Profile with tools
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Profile Process
Form a hypothesis
Make a change
Reproduce the problem
Profile with tools
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Instruments Templates Used
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Instruments Templates Used
3 Improvements 2 Improvements
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Can Profile Virtually Anything
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Can Profile Virtually Anything
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"Fantastic and Fast"
"Fantastic and Fast"
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"Must buy this app"
"Must buy this app"
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More Information
Michael Jurewitz
Developer Tools Evangelist
[email protected]
Instruments Documentation
Instruments User Guide (Xcode Documentation)
Instruments New Features User Guide
Apple Developer Forums
http://devforums.apple.com