<table><tr><td style="">rjvbb added a comment.
</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/D18380">View Revision</a></tr></table><br /><div><div><blockquote style="border-left: 3px solid #a7b5bf; color: #464c5c; font-style: italic; margin: 4px 0 12px 0; padding: 4px 12px; background-color: #f8f9fc;"><div class="remarkup-code-block" style="margin: 12px 0;" data-code-lang="text" data-sigil="remarkup-code-block"><pre class="remarkup-code" style="font: 11px/15px "Menlo", "Consolas", "Monaco", monospace; padding: 12px; margin: 0; background: rgba(71, 87, 120, 0.08);">As far as I know, using qobject_cast is faster than comparing class names, because it only compares metaclass pointers. Additionally, it allows subclasses.</pre></div></blockquote>
<p>Purely academic: that would be true for an ObjC-like construct like <tt style="background: #ebebeb; font-size: 13px;">isKindOfClass</tt> but doesn't it qobject_cast also do additional work as part of the casting?<br />
Allowing subclasses could be good here, but it could also defeat the purpose, that'd depend on what the subclass changes w.r.t. KFileWidget.</p></div></div><br /><div><strong>REPOSITORY</strong><div><div>R241 KIO</div></div></div><br /><div><strong>REVISION DETAIL</strong><div><a href="https://phabricator.kde.org/D18380">https://phabricator.kde.org/D18380</a></div></div><br /><div><strong>To: </strong>rjvbb, ngraham, Frameworks, Dolphin, apol, dfaure, ahartmetz<br /><strong>Cc: </strong>cfeck, dhaumann, kwrite-devel, kde-frameworks-devel, michaelh, ngraham, bruns<br /></div>