re: Comparing MongoDB & MySQL VIEW POST

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Interesting to know that $lookup is heavy though, I did use it without noticing performance issues but that's still something to consider.

The lookup alone I don't think adds roo much, but usually you need other ops.
And try the test on a large db, eventually with sharding then you'll see the out of memory issue 😀

large remains to be defined but yup I see the idea

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