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Why is redis so fast?

Mar 1, 2022

Why is Redis so fast? There are 3 main reasons as shown in the diagram below.

1. Redis is a RAM-based database. RAM access is at least 1000 times faster than random disk access.

2. Redis leverages IO multiplexing and single-threaded execution loop for execution efficiency.

3. Redis leverages several efficient lower-level data structures.

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