Should I cache images?
1 Answer. Generally yes, images should be cached in at least memory, and depending on your app (how likely is it to be reused,etc) in memory and storage. If you want to support your 3rd point (displaying when offline), you need to do storage caching, and memory caching is optional but probably a good idea.
What is server cache?
A cache server is a dedicated network server or service acting as a server that saves Web pages or other Internet content locally. By placing previously requested information in temporary storage, or cache, a cache server both speeds up access to data and reduces demand on an enterprise’s bandwidth.
What is a cache eviction?
Cache eviction is a feature where file data blocks in the cache are released when fileset usage exceeds the fileset soft quota, and space is created for new files. The process of releasing blocks is called eviction. You can use automatic cache eviction or define your own policy to decide which file data is evicted.
How does a precache image load in the browser?
Once an image has been loaded in any way into the browser, it will be in the browser cache and will load much faster the next time it is used whether that use is in the current page or in any other page as long as the image is used before it expires from the browser cache. So, to precache images, all you have to do is load them into the browser.
How to use an image once it has been cached?
How do you use an image once it has been cached? (and just to verify, if an image is cached on page A, it is possible to call it from the cache to use it on page B, right?) Also, is it possible to set when the cached version of the image will expire?
How does cache work on a web page?
Everytime the images are actually preloaded again or used in a web page, it refreshes their position in the browser cache automatically so they are less likely to get flushed out of the cache. The browser cache is cross-page so it works for any page loaded into the browser.
How big is a caching image file size?
To give you an idea of what caching images can mean for your applications, I built an experiment that fetches ten image from Unsplash without any caching enabled. The average file size is 10 megabytes. The example app using images from Unsplash. This is the result of opening and closing the app five times.