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Under the hood

The technical decisions you cannot see from outside: caching, calibration, audio mixing, logs. The things that decide whether a project survives a month.

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Under the hood·13 August 2026·2 min readTravel time computed in the browser — 460 calibration routes instead of a routing APIA language model will suggest calling an external router on every slider move. It works in a demo and stops working at a hundred users. Here is how to compute it locally with a median error of 13.6 percent.Read