Urgent.News

What's breaking now, across thousands of outlets.

More in Tech

Row vs. Column: Measuring Locality with csperf

Why this lesson exists Locality is often taught as a theoretical concept: row‑major arrays are faster than column‑major ones because the CPU cache lines are contiguous.

  • Benchmarks compiled with same optimization flags, JSON artifacts contain detailed metrics.
  • Diffing JSON files generates CSV highlighting layout performance differences on specific machines.

Runtime CSS-in-JS deserves a rehearing

Runtime CSS-in-JS has largely been written off as too expensive for the browser. The reasons are familiar: some libraries rebuilt styles on every React render, interleaved stylesheet writes with…

The Third Leg of the Parity Test

Months ago, a commenter on this series proposed a test: if the same backend really stands behind both doors, then auth, error behavior, and idempotency must be preserved across them.

  • The third parity test leg focuses on preserving auth, error behavior, and idempotency across doors.
  • Agents trigger retries based on timeouts, ambiguous errors, truncated responses, and failed calls.
  • The MCP protocol allows second-order retries, serving as a control case to demonstrate failure mode.

More from Wednesday 7 October →