L1 is the fastest to be read by the CPU and it is generally built into the processor chip.
Cache memory
The cache memory is used to store data for future operational purposes, hence, cache memory can be easily accessed since it is used for operational purposes.
There are three cache levels which are L1, L2 and L3. L1 cache is the smallest of these three ranging from 8KB to 64KB. L1 is the fastest to be read by the CPU and it is generally built into the processor chip. Multi-core CPUs will generally have a separate L1 cache for each core.
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