Redundant column selections

[dullbananas]

For example, the post and post_saved tables both have columns for the post id, and both of these columns are selected in post_view because post_saved::all_columns is used. Selecting less columns will speed up compile time (#3610).

diesel-rs/diesel#3223 (comment)

Edit: selecting less columns did not speed up compile time

[dullbananas]

It might also be good to avoid selection of columns with an already known value, such as post_saved::person_id