Most of the resources of an HTML page don’t change from day to day. Yesterday’s CSS files are probably the same ones in place today. The same is true for any included Javascript files. I’m also guessing you don’t swap out images on web pages all that often either. So why make browsers download all these resources again the next time they visit the page?
Tag: caching
How To Leverage DNS Caching
One of the recurring themes in this series and many articles about performance is caching. Serving cached content often leads to significant performance improvements as it saves round trips and thus time over a network.