In every site or web-based application there is some data that doesn’t change very often, which is requested very frequently by a lot of end users. Examples are the list of article categories, or the e-store’s product categories and product items, the list of countries and states, and so on. The most common solution to increase the performance of your site is to implement a caching system for that type of data, so that once the data is retrieved from the data store once, it will be kept in memory for some interval, and subsequent requests for the same data will retrieve it from the memory cache.
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