I have a meta-suggestion - make the implementation of PartialOrd (and potentially other derivable traits) for tuples in libcore a golden standard, and make built-in macros follow it exactly.
All structures should be equivalent to tuples up to field names.

• Make the same changes as this PR does to impl PartialOrd for (T1, T2, ...) in libcore, benchmark them, pass them through T-libs, etc.
• Generate exactly the same code (up to field names) in rustc_builtin_macros and link both implementation to each other with docs telling that any changes must be synchronized.

Originally posted by @petrochenkov in #81384 (comment)

@rustbot label: +T-libs +A-macros