Solution to the Bottleneck Problem

In order to eliminate the solution it was suggested to make the main memory faster. But
that evolved a problem that the 1-ns memory is extremely expensive as compared the
currently popular 100-ns memory.
Finally it was decided that in addition to the relatively slow main memory, put a small
amount of ultra-fast RAM right next to the microprocessor on the same chip and make
sure that frequently used data and instructions resides in that ultra-fast memory
It increases the performance. It supports better over performance due to fast access to
frequently used data and instructions.