How does the chrome browser determine memory cache and disk cache?
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The Chrome browser uses both memory cache and disk cache to store web resources such as HTML, CSS, JavaScript, and images.
Memory cache, also known as the in-memory cache, is stored in the browser’s RAM. When a web page is loaded, Chrome stores a copy of the resources in memory so that they can be quickly accessed if the user navigates to the same page again. This allows the browser to avoid re-downloading the resources, which can save time and bandwidth. Memory cache is generally faster than disk cache, but the resources are removed from memory cache when the browser is closed.
Disk cache, also known as the on-disk cache, is stored on the user’s hard drive. When a web page is loaded, Chrome stores a copy of the resources on disk so that they can be accessed even after the browser is closed. Disk cache is slower than memory cache, but the resources are retained even after the browser is closed.
Chrome uses a Least Recently Used (LRU) algorithm to determine which resources to keep in memory cache and which to remove when memory is running low. Resources that are accessed frequently are kept in memory, while resources that are accessed less frequently are removed.
When a resource is requested, the browser first checks if it is available in the memory cache. If it is not available, it then checks if it is available in the disk cache. If it is not available in either cache, the browser will request the resource from the server.
Chrome also uses a heuristic to determine which resources to store in disk cache. Resources that are likely to be accessed again in the future, such as images, JavaScript and CSS files, are stored on disk, while resources that are less likely to be accessed again, such as HTML files, are not stored.
In summary, Chrome uses both memory cache and disk cache to store web resources, with memory cache being faster but less persistent and disk cache being slower but more persistent. Chrome uses a LRU algorithm to determine which resources to keep in memory cache and a heuristic to determine which resources to store in disk cache.