And this is why we always benchmark the before and after! Because the answer is: It Depends.https://twitter.com/sgrif/status/1029822043716378624 …
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My experience is that this isn't always true. Example: `SomeModel.some_scope` is needed early in the view. Later, they want `SomeModel.some_scope.where { this_thing: false }`. Sometimes much faster to just enumerable it rather than let the DB do the work.
Yes, if you *already* have the data on the Ruby side enumerating there will always be faster than round tripping to the DB
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Also not quite accurate. :-) If the `select` block invokes typecasting of, say, `AS::TWZ`, the separate query can be faster.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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