Microsoft has been working to improve the performance of Edge and their latest feature in development is called “Startup Boost.”
The feature is actually familiar from the old days of Internet Explorer and would see the browser process launch in the background when you boot your PC, rather than when you actually click on your browser icon.
Now when you launch your browser from the taskbar, desktop, and links within other apps, such as the web search pane in Windows Search the window would pop up instantly.
According to the Chromium commit the feature will be optional and with a toggle available in Edge > Settings > System. To mitigate slow boot issues the process would be loaded with a low priority setting.
The feature is currently being developed for Edge 88 and should hit Edge Canary and Dev channels in a few weeks.