Siri Shortcuts are reportedly running almost twice as fast after users are updating their iPhones on iOS 14.6. There is definitely a big boost in terms of speed as compared to the previous version of iOS which was 14.5. A reddit user, who created a 700-action Shortcut for scraping websites, said the operation now runs successfully in 13 seconds. Before the update, the same process would take 30 seconds to finish.
The speed boosts are noticeable when the actions are elaborate. Shortcuts that contain a multitude of actions are now faster than ever. Apple did not specify improvements in Shortcuts in the changelog. But there definitely was the general performance upgrades that could be the part of this speed boost.