https://www.vijaypagare.in/blog/performance/Recent content in Performance on Vijay PagareHugoen-USFri, 17 Apr 2026 22:23:16 +0530https://www.vijaypagare.in/blog/caching-types-patterns-and-trade-offs/Fri, 17 Apr 2026 21:05:00 +0530https://www.vijaypagare.in/blog/caching-types-patterns-and-trade-offs/<hr> <h2 id="what-is-caching">What is Caching?</h2> <p>Caching is the practice of storing data in temporary storage to enable faster access.</p> <p>At a systems level, the speed difference is massive:</p> <ul> <li>Hard disk access: ~1 ms</li> <li>Memory (RAM) access: ~100 ns</li> </ul> <p>That’s roughly <strong>10,000x faster</strong>.</p> <p>The entire idea of caching is to avoid expensive operations (disk, DB, network, computation) by serving precomputed or previously fetched data.</p> <hr> <h2 id="types-of-caching">Types of Caching</h2> <h3 id="1-external-cache">1. External Cache</h3> <p>A separate system acting as a shared cache layer.</p>