The Solana blockchain prioritizes ultra-fast transactions and high capacity through several innovative features. It uses Proof-of-History for unique timestamping, the Turbine protocol for rapid block building, and parallel processing with shards to handle transactions simultaneously.
Additionally, Solana does not have an in-protocol mempool; all transactions are sent to leaders for inclusion in a block until the blockhash expires. Transactions can be routed to leaders by proxy via an RPC server or a TPU client.
High-level overview of a lifecycle of a Solana transaction.
