In Figure 4-9, we can see this in action on a test suite available at. The smaller the rendering time, the greater the frame rate you will get. For example, you can select “Enable continuous page repainting” and start adding or removing CSS properties (such as shadows, transforms, and filters) and see if the graph goes up (it takes more time to render) or down (it’s faster). It lets you find rendering issues such as content that is taking too much time to render and might decrease your frame rate or harm the scrolling experience. “Continuous painting mode” will force a repaint on each frame. “Show FPS meter” lets you see a frame rate graph on your device to find responsiveness problems
#Iphone safari inspector emulator mac code#
See the console and execute JavaScript code on itįigure 4-8. See useful timelines, such as rendering information When connected, you can use the Chrome Developer Tools as usual to do all of the following:Īccess the resources list, including local storage, and SQL and IDB databasesĪdd JavaScript breakpoints and use debugging tools After you do that, your phone will show you a toast message saying that “You are now a Developer!” The developer options will now be available in the main Settings window.
#Iphone safari inspector emulator mac android#
To enable developer mode in Android 4.2+, you need to tap seven times on the build number. It’s not a mistake-it’s like an Easter egg. You will need to tap on that Build item seven times. Go to Settings→“About phone” (or Settings→“About tablet”) and find the “Build number” entry (the last item in the list on most devices).
To do so, you need to do something a little weird. So, you first need to put your device in developer mode. But if you are doing this for the first time on an Android 4.2+ device, you won’t find the “Developer options” menu inside Settings.
It’s an easy task, right? Well, it is if you have an Android 4.1 or older device. To enable USB debugging on your Android phone or tablet, you need to open the Settings app, go to “Developer options,” and enable the “USB debugging” option. You can read more about the new Rendering Frames mode in the WebKit Blog.Įnabling USB Debugging on Your Android Device If you have a performance issue, you can see frame by frame what the engine is doing and find the bottleneck. The data is displayed in three sections: an overview graph (top left), a records table (main), and a summary chart (top center and right). Instead of seeing events in the timeline, you will see a representation like that in Figure 4-4: a frame-based, task-specific view of existing profiler/instrumentation data. Starting with Safari 9 on macOS El Capitan, the timeline can be replaced with a different mode: Rendering Frames. You can filter the list of entries from the selected region by using the search box in the bottom-left section and/or clicking on one of the timeline names, such as “Network Requests” or “Layout & Rendering.” To remove a timeline filter, just click on the “X” at the right of the timeline’s name. Each row will represent one entry (e.g., one downloaded resource or one paint operation). If you select a region in the timeline, you will see a detail view in the lower section of the screen.
If you scroll up or down (using the mouse wheel or a touchpad gesture) over the timeline, you will be able to zoom in or out in the timeline. Once you have a recording dump on the screen, you will find several colored bars over the timeline. Some features, such as real cellular network conditions or touch feedback, can only be experienced with actual phones or tablets. While we can make do with only using the analysis from the iOS Simulator, it’s always a good idea to check real performance on actual devices.
0 kommentar(er)
