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Type: Bug
Resolution: Done
Priority: P2: Important
Fix Version/s: 6.4.0 Beta1
Affects Version/s: 6.2.2
Component/s: Build System: CMake, QML: Tooling
Labels:
None
Environment:
Windows 11, visual studio 2019, msvc 16, cmake

Platform/s:

Windows
Commits:
2ee7ec4d24 (qt/qtdeclarative/dev) 2ee7ec4d24 (qt/tqtc-qtdeclarative/dev) 2ee7ec4d24 (qt/qtdeclarative/6.4) 2ee7ec4d24 (qt/tqtc-qtdeclarative/6.4) e2a3667e34 (qt/qtdeclarative/6.3) e2a3667e34 (qt/tqtc-qtdeclarative/6.3)

When compiling a Qt project, the qmlimportscanner.exe takes roughly 45 seconds to perform its work.
This happens even when there are no changes in any qml or related code, making every small code change incredibly slow.

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Screenshot 2022-05-03 100610.png
03 May '22 08:06
19 kB
Luca Lolli
perf.txt.gz
19 May '22 11:10
14 kB
Cajus Pollmeier
perf-graph.txt.gz
19 May '22 11:10
232 kB
Cajus Pollmeier
importomania.tgz
24 May '22 07:11
1 kB
Cajus Pollmeier
qmlimportscanner
24 May '22 07:12
0.3 kB
Cajus Pollmeier

relates to

QTBUG-102263 iOS: qmake is very slow in large projects

Reported

QTBUG-95609 cmake names for qml plugins

Closed

QTBUG-92887 [cmake] qt6_import_qml_plugins without import scanner

Reported

resulted in

QTBUG-115170 [Reg 5.15 -> 6.5] qmlimportscanner does not include module versions

Closed

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For Gerrit Dashboard: QTBUG-103187
#	Subject	Branch	Project	Status	CR	V
412828,14	qmlimportscanner: Improve performance using caches	dev	qt/qtdeclarative	Status: MERGED	+2	0
413225,5	qmlimportscanner: Add logging to help with debugging performance	dev	qt/qtdeclarative	Status: MERGED	+2	0
413235,13	qmlimportscanner: Improve performance using caches continued	dev	qt/qtdeclarative	Status: MERGED	+2	0
413421,3	qmlimportscanner: Ensure deterministic output	dev	qt/qtdeclarative	Status: MERGED	+2	0
414495,2	qmlimportscanner: Ensure deterministic output	6.3	qt/qtdeclarative	Status: MERGED	+2	0
414516,3	qmlimportscanner: Add logging to help with debugging performance	6.3	qt/qtdeclarative	Status: MERGED	+2	0
414517,3	qmlimportscanner: Improve performance using caches	6.3	qt/qtdeclarative	Status: MERGED	+2	0
414518,3	qmlimportscanner: Improve performance using caches continued	6.3	qt/qtdeclarative	Status: MERGED	+2	0
414519,3	qmlimportscanner: Ensure deterministic output	tqtc/lts-6.2	qt/tqtc-qtdeclarative	Status: MERGED	+2	0
414520,3	qmlimportscanner: Add logging to help with debugging performance	tqtc/lts-6.2	qt/tqtc-qtdeclarative	Status: MERGED	+2	0
414521,3	qmlimportscanner: Improve performance using caches	tqtc/lts-6.2	qt/tqtc-qtdeclarative	Status: MERGED	+2	0
414522,3	qmlimportscanner: Improve performance using caches continued	tqtc/lts-6.2	qt/tqtc-qtdeclarative	Status: MERGED	+2	0