.NET core stands out as a high-performance and versatile framework, offering many features contributing to its speed and broad applicability. One key factor is its cross-platform compatibility, enabling seamless deployment across Windows, macOS, and Linux environments. 

Performance gains are achieved through optimizations like Just-In-Time (JIT) compilation and the lightweight CoreCLR runtime. With a focus on scalability, asynchronous programming patterns enable the handling of numerous concurrent operations.