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Keep each fact once in a .qetz: drop the stored project database

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A .qetz held the engineering data twice: the document's tables, and
beside them QElectroTech's own project database (stage D2/D3), which
QElectroTech also builds from the document. Two copies of one fact can
disagree, and the copy cost a third of the file. Now project.sqlite holds
the document's tables only; QElectroTech builds its own project database
from them when the project opens, as it does for a .qet.

Measured (this build, lazy folios):
  industrial (50 folios): 620 -> 374 KB, open 0.37 -> 0.65 s
  f2099/nuri (136 folios): 3.27 -> 2.20 MB, open 2.2 -> 3.5 s
The same projects as .qet open in 3.3 s and 23 s.

Saving still copies the file of every folio not built, with its rows
(stage D4): the project keeps the part each folio was read from. nuri
opened and saved again: 6.3 s, no folio built, the same bytes.

A symbol's terminal list is left out of the folio file when every
folio, symbol and wire has a uuid of its own, now checked on the
document (QetContainer::ownUuids()) rather than by the stored database
being written.

Checked: 342 corpus projects open, .qetz -> .qet equals the plain
resave, a .qetz saved twice gives the same bytes; tst_lazyfolios,
tst_qetcontainer, tst_resaveunchanged (which now checks project.sqlite
holds only the document's tables).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
ispyisail
2026-10-14 07:35:34 +13:00
parent 39855e1bb5
commit c259cae429
14 changed files with 165 additions and 842 deletions
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sources/diagram.cpp
+2 -19
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@@ -882,20 +882,6 @@ QDomElement Diagram::deferredXmlWithHeader(QDomDocument &document)
return folio;
}
/**
@brief Diagram::deferredXml
@return the XML of this folio's items while they are not built: kept
from the project's document, or read now from the folio's part of the
.qetz the project was opened from
*/
QDomElement Diagram::deferredXml()
{
if (m_deferred.isNull() && !m_deferred_part.isEmpty() && m_project) {
m_deferred = m_project->readFolioPart(m_deferred_part);
}
return m_deferred;
}
/**
@brief Diagram::buildDeferred
Build this folio's items from the XML kept for later, and nothing else.
@@ -908,12 +894,9 @@ bool Diagram::buildDeferred()
if (isLoaded()) {
return false;
}
QDomElement xml = deferredXml();
QDomElement xml = m_deferred;
m_deferred = QDomElement();
m_deferred_part.clear();
if (xml.isNull()) {
return true; //its part could not be read: QETProject::readFolioPart() said why
}
m_kept_part.clear();
m_kept_text.clear();
projectDataBase *db = m_project ? m_project->dataBase() : nullptr;
if (db) db->setBuildingFolio(true);