Internet cache I keep hearing about the importance of using a cache when connected to the Internet. It is a data storage area. It can be in memory or on the hard disk, or both. It stores information which comes in slowly and makes it available if needed more than once. When the allocated space is full, new information replaces the old one.
Speed is relative.
A hard disk is snail paced when compared to RAM chips. And a hard disk is a speed demon when compared to Internet transfer. The Internet uses generous amounts of graphics which can be reused. If you use the same site frequently, then it is useful to keep that information in the cache. You can experiment with cache size.