In another article, you learned how to capture a trace using the Utilities menu found on your wearable. Taking it one step further, this guide will help you understand where to find those traces and how to get the most out of the information you’ve captured. We’ve also include a handy guide to Perfetto Tool Keyboard shortcuts that you can reference while working within Perfetto.

By the end of this user guide, you’ll know how to:

As you get more familiar with Perfetto and the Real-time Metrics menu, reference this checklist to better understand the cause and effect of performance issues. For a more in-depth explanation and step-by-step tutorial on how to use this checklist, go watch the Connect ‘23 Horizon World Performance Optimization Best Practices talk.

The first step in analyzing traces is downloading them once they’ve been captured.

To view a trace file, drag the file onto the Perfetto UI.

Any sampler block name with the string Vert in it is related to the networking category. You might need to debug this when there are too many network calls or too many dynamic entities, such as position, color, or changing states at a rapid rate. Networking blocks have the following names:

Select a script sampler block to inspect its scripted actions or events for details. Scripting blocks have the following names:

For rendering information, select a sampler block, such as MainCamera, Sunlight, or BatchManager. The block shows Rendering as the category in the detail pane.