<table><tr><td style="">broulik created this revision.<br />broulik added a reviewer: Plasma.<br />broulik set the repository for this revision to R242 Plasma Framework (Library).<br />Restricted Application added projects: Plasma, Frameworks.<br />Restricted Application added subscribers: Frameworks, plasma-devel.
</td><a style="text-decoration: none; padding: 4px 8px; margin: 0 8px 8px; float: right; color: #464C5C; font-weight: bold; border-radius: 3px; background-color: #F7F7F9; background-image: linear-gradient(to bottom,#fff,#f1f0f1); display: inline-block; border: 1px solid rgba(71,87,120,.2);" href="https://phabricator.kde.org/D4362" rel="noreferrer">View Revision</a></tr></table><br /><div><strong>REVISION SUMMARY</strong><div><p>Plasma spends roughly 0.5ms per applet just compiling this component (QQmlComponent creation), so cache it away.<br />
All applets did share the same QQmlEngine here but I don't think this can be trusted, hence store the components in a QHash per engine.<br />
While at it, turn the Item into a QtObject to reduce overhead since we just want the Component.onCompleted to be executed and that's it.</p>
<p>Before: 41 calls (18ms in total)<br />
After: 41 calls (1.9ms in total)</p></div></div><br /><div><strong>TEST PLAN</strong><div><p>Verified that a QtQuick Controls 1 Button still uses the Plasma theme.</p>
<p>The QObject::destroyed I use to remove the component from the hash again is never executed, even on kquitapp plasmashell.</p></div></div><br /><div><strong>REPOSITORY</strong><div><div>R242 Plasma Framework (Library)</div></div></div><br /><div><strong>REVISION DETAIL</strong><div><a href="https://phabricator.kde.org/D4362" rel="noreferrer">https://phabricator.kde.org/D4362</a></div></div><br /><div><strong>AFFECTED FILES</strong><div><div>src/plasmaquick/appletquickitem.cpp<br />
src/plasmaquick/private/appletquickitem_p.h</div></div></div><br /><div><strong>EMAIL PREFERENCES</strong><div><a href="https://phabricator.kde.org/settings/panel/emailpreferences/" rel="noreferrer">https://phabricator.kde.org/settings/panel/emailpreferences/</a></div></div><br /><div><strong>To: </strong>broulik, Plasma<br /><strong>Cc: </strong>plasma-devel, Frameworks, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas<br /></div>