Before starting on the rendering work for Napari we implemented some
performance monitoring tools. Performance is extremely important to
achieving rendering at interactive speeds. With performance monitoring
Napari can produce JSON trace files that
chrome://tracing can display.
This visibility into what is happening and how long things are taking is
indispensible for this type of work.
This trace shows an asynchronous load happening in the background.
Official Napari Docs
Read this walk through of using Performance Monitoring on Napari’s site. The page contains a lot of details about how the feature works.