Lazy loading is a technique that speeds up page loads on web pages. Its idea in all its simplicity is to refrain from loading any images that are not visible. Any images will be loaded just before they appear as the visitor scrolls the page. This should make no apparent difference in the user experience but the loading times will be greatly improved, especially on sites that feature a lot of images.
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While others try to add more components to their hosting to make it go faster, we decided to build our hosting cloud fast from the ground up. We did so by stripping out everything we knew was deadweight.