profile instruments
Asked on 2025-08-22
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The "Profile Instruments" are a set of tools within Xcode's Instruments app that allow developers to analyze and optimize various aspects of their app's performance. At WWDC 2025, several sessions discussed the use of these tools:
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Power Profiler: This tool is used to profile and optimize power usage in apps. It helps identify power spikes and assess the impact of different components like CPU, GPU, and networking on power consumption. You can learn more about this in the session Profile and optimize power usage in your app.
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CPU Profiler: This tool is used to optimize CPU performance by sampling call stacks and visualizing them as a call tree or flame graph. It helps identify which parts of the code consume the most CPU cycles. This is covered in the session Optimize CPU performance with Instruments.
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Time Profiler: This instrument samples what's running on the system's CPUs at regular intervals to help identify performance bottlenecks. It is useful for understanding how work is distributed over time and which threads are active. This is also discussed in the session Optimize CPU performance with Instruments.
These tools are essential for developers looking to improve the efficiency and performance of their applications, ensuring better battery life and smoother user experiences.
Profile and optimize power usage in your app
Learn how to optimize your app for maximum battery life. Discover how to identify the root cause of power issues in your app — whether you can reproduce the issue while connected to Xcode or on the go. Find out how to measure power use so you can make better decisions about new features and proactively build more efficient apps.
Optimize CPU performance with Instruments
Learn how to optimize your app for Apple silicon with two new hardware-assisted tools in Instruments. We’ll start by covering how to profile your app, then dive deeper by showing every single function called with Processor Trace. We’ll also discuss how to use CPU Counters’ modes to analyze your code for CPU bottlenecks.
What’s new in Xcode
Discover the latest productivity and performance advancements in Xcode 26. Learn how to leverage large language models in your development workflow. Explore editing and debugging enhancements, improved performance and testing tools, and Swift Build - the open-source build system engine used by Xcode.