How the complex and internal architecture is different from native MySQL

SingleStoreDB and MySQL do not share any code. SingleStoreDB is a real-time, unified distributed SQL database built from the ground up for maximum performance for streaming, transactions and analytics. SingleStoreDB offers a ground-breaking Universal Storage engine and SQL-based execution built around a scalable distributed architecture and lock-free data structures. SingleStoreDB is compatible with MySQL client software and uses the same wire protocol as MySQL supporting similar SQL syntax as MySQL for easier compatibility and migrations.