Performance: Custom endpoints with Payload Local API vs. GraphQL

[hunghvu]

Let's say for only one collection, sometimes I only need to retrieve certain fields from it. There are 2 possible approaches that I can think of.

1. Create a custom endpoint, in combination with Payload Local API. Fetch and manipulate the response on server and return.
2. Use GraphQL instead, to specify the fields I want to receive.

For the first approach, then performance lies in an implementation of custom endpoint, and Payload Local API speed.
For GraphQL, I don't have much experience on it, but I believe it also has certain degree of overhead. Besides, it is probably not worth using GraphQL just for one endpoint.

Have anyone gone over the same thought process, how is your experience and what is your opinion?