Instant Load can speed up your store dramatically by predict and preload the pages user may view forward. It makes user navigation effectively instant in most cases. Let's preview this feature in this video:
To enable this feature in Theme Editor > Global > tick on Enable Instant-Load for faster browsing pages (experiment).
Note that this feature only works for certain pages such as: Category pages, product pages, brand pages, blog and static web pages. Other pages will be loaded as normal.