We first want to know how the main thread is used. This will launch your app in the selected device after which you can start your flow.Īfter you’ve finished the flow you want to improve you can stop recording and dive into the results. Creating a new recording using the Time Profiler instrumentĪfter selecting the Time Profiler Instrument we can start a new recording by pressing the red button on the top left or by using ⌘ + R. The Time Profiler is our starting point to get insights in which part of the code can be optimized. In the Collect app performance example, we had the goal to speed up the flow of adding content to our app. The better this part in your app is, the better your app is performing. The Time Profiler instrument gives insights into the system’s CPUs and how effective multiple cores and threads are used. Using the Xcode Instruments Time Profile to investigate and improve the performance A physical device will show more realistic results and is therefore recommended to be used. Can I use instruments in the simulator?Īlthough most of the instruments can be run on the simulator it’s not always recommended to do so. You might end up in an issue which can be perfectly solved by one of the available instruments. It is worth though to dive into the available instruments and to know which ones are available. Some of them, like the Game Performance instrument, is only valuable if you’re developing games. Each of them can be very valuable but they’re definitely not needed for every app. Xcode Instruments Overview Should I know how to use each instrument?Īn overview which shows 17 different instruments can be quite overwhelming. This will rebuild your product and opens the Xcode Instruments overview. You can access the instruments by using Product ➔ Profile from the Xcode menu for which the shortcut handle is ⌘ + I. Track down problems in your source codeĪnd a lot more! How can I access Xcode Instruments?.It’s part of the Xcode toolset which also includes tools like Create ML and the Accessibility Inspector. Xcode Instruments is best described as a powerful and flexible performance-analysis and testing tool. ![]() Time to dive in and see how we improved this flow! What is Xcode Instruments? Start building SwiftUI views with Judo.Īs you can see, the importing popup shows way longer in the old version while the final share sheet is being delayed a lot as well. Build your interface in a completely visual canvas, then drag and drop into your Xcode project and wire up button clicks to custom code. ![]() Judo takes a different approach to building visually-think Interface Builder for SwiftUI. Build SwiftUI Interfaces Visually Let’s face it, SwiftUI previews are limited, slow, and painful.
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