With a script as the Electron entry, the app path is the script's folder;
main.js loads chrome.html, home.html and every overlay by relative name, so
all of them failed with ERR_FILE_NOT_FOUND and every traced run measured a
broken launch (it also left a window showing the error page). The tracer now
sets app.setAppPath to TheseusNavigator, records failed main-frame loads, and
run.mjs marks such a run INVALID.
Re-measured (warm runs, fresh profile): the per-overlay lazy loading in
e524c12 saves 5 processes and ~100 MB private memory at 15 s — not ~30 MB
with an unchanged process count as its message says; that figure came from
the broken runs. The BNS indexer utilityProcess costs ~60-75 MB.
Measures dev-tree launches against a throwaway profile, without changing
main.js: time to app ready, toolbar and first page; main-thread blocks; add-on
activation; overlay pages loaded; main-process fetches; process count and
private memory at 15 s. One row per run, so a startup change can be compared
with the numbers before it.
node scripts/boot-trace/run.mjs [--runs 3] [--seconds 25] [--fresh] [--profile <dir>]
