Android phones rarely slow down overnight. Performance usually erodes in small, frustrating steps as apps pile up temporary files, browsers hoard old images, and the system juggles more cached data ...

System-on-a-Chip (SoC) designers have a problem, a big problem in fact, Random Access Memory (RAM) is slow, too slow, it just can’t keep up. So they came up with a workaround and it is called cache ...