Overview
A cache hit is the ideal scenario for processor performance. It means the data is available immediately (within 1-4 cycles for L1 cache), allowing the CPU to continue execution without delay.
Cache Hit Ratio
The percentage of memory accesses that result in a cache hit. High-performance software is designed to maximize this ratio by improving data locality.
Importance
Modern CPUs rely heavily on high hit ratios (often >95%) to maintain their high execution speeds.