BREAKING: Use packed structs #7
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#### Problem Many of the structs in the SDK use `extern` layout. While this ensures compatibility with C ABI, it can also be less performant for on-chain programs. #### Summary of changes Move `PublicKey`, `Account.Data`, and `Rent` to be `packed` structs. This is a breaking change because the underlying layout of many types will change.
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Problem
Many of the structs in the SDK use
externlayout. While this ensures compatibility with C ABI, it can also be less performant for on-chain programs.Summary of changes
Move
PublicKey,Account.Data, andRentto bepackedstructs. This is a breaking change because the underlying layout of many types will change.