Why is Redis so fast?

Why is Redis faster than SQL?

In Redis, Read and Write operations are extremely fast because of storing data in primary memory. In RDBMS, Read and Write operations are slow because of storing data in secondary memory. Primary memory is in lesser in size and much expensive than secondary so, Redis cannot store large files or binary data.

Is there anything faster than Redis?

Redis vs MongoDB Speed This means that as the data stored in the database gets larger and larger, MongoDB is able to operate much faster than Redis. Redis is only significantly faster when the stored data is relatively small in size.

Why is Redis cache faster than DB?

Because it stores data in memory in the form of key value pair, we can store frequently accessed data in cache which are not changes very frequently. Reading from cache is much faster than database.

Is Redis faster than DB?

Redis is faster though than most relational databases. If you're only going to be doing key:value pair queries, then you'll want to use Redis.