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.

Iphone safari inspector emulator mac