What does #[pallet::compact] do?

Question

What does #[pallet::compact] do?

Answer 1

https://paritytech.github.io/substrate/master/frame_support/pallet_macros/attr.compact.html

Compact encoding for arguments can be achieved via #[pallet::compact].
The function must return a DispatchResultWithPostInfo or DispatchResult.

It can make the args size smaller when you send a tx.

Answer 2

Compact encoding for arguments can be achieved via #[pallet::compact]. The function must return a DispatchResult. it is useful for getting the compact decode