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As noted in the codebase and #735, the QML disk cache doesnt work with
qs:URLs.This makes
vfs/<id>/qsthe import root and mirrors the full config there. Normal dirs are symlinked directly; dirs with generated files likeqmldir,//@ if, orqml.jsonare mirrored with symlinks plus the generated files. Generated files are only rewritten when their contents change so cache mtimes stay valid.The URL interceptor also canonicalizes config QML/JS/qmldir paths into the mirror so the same document cant be loaded under both
qs:andfile:URLs.If the VFS cant be created it falls back to
qs:like before.On DMS this drops warm launch to "Configuration Loaded" from 1.28s to 0.77s and RSS by ~40MB.
Verify with
QT_LOGGING_RULES=qt.qml.diskcache=true; the second run should be silent.