a305fa0472
Bank::vote_accounts redundantly clones vote-accounts HashMap even though an immutable reference will suffice: https://github.com/solana-labs/solana/blob/95c998a19/runtime/src/bank.rs#L5174-L5186 This commit implements copy-on-write semantics for vote-accounts by wrapping the underlying HashMap in Arc<...>. Co-authored-by: behzad nouri <behzadnouri@gmail.com>