Computer architecture — Cache memory is intentionally used in high-speed systems to reduce average memory access time. Evaluate the statement.

Introduction:
Cache memory places a small, fast memory between the CPU and slower main memory to reduce average access time. This principle underlies nearly all modern high-speed processors and microcontrollers. The question asks whether caches are used in high-speed systems, which tests fundamental architectural awareness rather than implementation details.

Given Data / Assumptions:

• Cache is faster but smaller than main memory.
• Programs exhibit locality of reference (temporal and spatial locality).
• We consider typical write policies and hierarchies (L1, L2, L3).

Concept / Approach:
By exploiting locality, caches store recently or nearby accessed blocks, so subsequent accesses hit the cache, avoiding long-latency main memory. Even embedded systems employ cache (or tightly coupled memory) to accelerate critical code paths. Thus, caches are indeed a hallmark of high-speed designs.

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