Thomas Camlong
bcea4733b9
Next loads the module graph for all 74 app routes when the server starts. Measured here: 1,114 files and 24 MiB of source resident before the first request, including one shared 16 MiB subtree behind the API routes that reaches every integration client. A dashboard serves a handful of routes per session. `experimental.preloadEntriesOnStart: false` is Next's documented switch for this. An earlier round of this work recorded route preloading as "framework behaviour, not something this codebase sets" - that was wrong, and the findings doc is corrected. Deterministic per-stage measurements, identical across both runs on each side: stage source loaded files heapUsed boot idle 24.0 -> 10.6 MiB 1114 -> 706 70.7 -> 44.8 (-37%) post-login 27.9 -> 19.3 MiB 1215 -> 884 123.8 -> 109.8 board loaded 29.0 -> 21.7 MiB 1323 -> 1006 (run-to-run noise) multi-tab 29.2 -> 22.9 MiB 1325 -> 1015 139.7 -> 127.8 post-soak 29.2 -> 22.9 MiB 1325 -> 1015 142.5 -> 127.4 The important part is the last two rows: 310 files and 6.3 MiB of source stay unloaded even after a full multi-tab session, so this is not merely deferred cost - routes the session never visits are never paid for at all. Live heap is lower at every stage, by 26 MiB at idle and 12-15 MiB under load and at rest. Peak node RSS does not move (350.3 -> 346.1, spreads overlap). V8 sizes its heap against available headroom, so a smaller live set does not shrink peak RSS; what improves is idle footprint and how much room is left before the heap cap. Median board load is +3% with overlapping spreads, so the first-hit cost this trades for did not show at this workload. Full E2E suite passes 8/8 against the built image.
Create T3 App
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