S/05 · Series · 1 part

The shape of a request

What an ASP.NET Core request costs at each stage of its path, measured at the runtime level rather than described at the API level.

Part 1:
No. 0520 Sept 2026Frameworks6 min read
The Middleware That Looked Expensive Was Not the One Spending the Bytes
Removing UseRouting dropped per-request allocation by 2.29 KB in isolation — separated from authorization's share, routing itself costs about 24 bytes.

The Middleware That Looked Expensive Was Not the One Spending the Bytes