Node.js · Senior · Question 63 of 75

How does DataLoader solve the N+1 problem in a GraphQL server?

✓Correct answer: It collects all load(id) calls made in one tick and turns them into one batched query, caching results per request
2It caches all queries forever in Redis
3It disables nested fields

Explanation

Create a new DataLoader per request, so caching never mixes data between users.

Further reading

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