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When Textarea show the file more than 1mb, the soft will use many memory, more than 1GB.

depends on

QTBUG-67274 Qt Quick lacks a built-in solution for rendering only items that are visible

duplicates

QTBUG-37872 Problem when displaying large amount of text with TextEdit

is required for

QTBUG-73063 Qt Quick Changes in Qt 6

QTBUG-90734 Make large content flickable

relates to

QTBUG-91468 TextEdit in long text when frequently insert text

(1 mentioned in)

For Gerrit Dashboard: QTBUG-60491
#	Subject	Branch	Project	Status	CR	V
357374,1	WIP Dynamically allocate QQuickTextPrivate::layout; delete after SG update	dev	qt/qtdeclarative	Status: NEW	-2	0
282970,32	Allow any Item to act as a viewport for any of its children	dev	qt/qtdeclarative	Status: MERGED	+2	0
357375,12	Large Text: populate only lines visible in Window into SG	dev	qt/qtdeclarative	Status: MERGED	+2	0
357575,17	Reduce QGlyphRun memory usage and speed up large Text instances	dev	qt/qtdeclarative	Status: MERGED	+2	0
366954,14	Large Rich Text: don't populate blocks outside the viewport into SG	dev	qt/qtdeclarative	Status: MERGED	+2	0
373702,1	Reduce QGlyphRun memory usage and speed up large Text instances	dev	qt/qtdeclarative	Status: ABANDONED	0	0
373914,2	Reduce QGlyphRun memory usage and speed up large Text instances	6.1	qt/qtdeclarative	Status: MERGED	+2	0
373915,2	Reduce QGlyphRun memory usage and speed up large Text instances	6.2	qt/qtdeclarative	Status: MERGED	+2	0
373917,3	Reduce QGlyphRun memory usage and speed up large Text instances	tqtc/lts-5.15	qt/tqtc-qtdeclarative	Status: ABANDONED	0	0
374045,1	Large Text: populate only lines visible in Window into SG	6.2	qt/qtdeclarative	Status: ABANDONED	0	0