Performance

.NET / JS interop is fast because:

• Marshaling does not use JSON serialization.
• Compile-time or runtime code generation avoids reflection.
• Use of shared memory and proxies minimizes data transfer.
• Use of modern C# like struct, Span<T>, and stackalloc minimizes heap allocation & copying.

Performance comparison vs Edge.js

Warm JS to .NET calls are nearly twice as fast when compared to edge-js using that project's benchmark.

	HTTP	Edge.js	Node API .NET	AOT	JS (baseline)
Cold	32039	38761	9355	362	1680
Warm	2003	87	54	47	23

Numbers are microseconds. "Warm" is an average of 10000 .NET -> JS calls (passing a medium-size object).