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      This is an automatically generated e-mail. To reply, visit:
      <a href="https://git.reviewboard.kde.org/r/122109/">https://git.reviewboard.kde.org/r/122109/</a>
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<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
 <p style="margin-top: 0;">On January 17th, 2015, 5:26 p.m. UTC, <b>Milian Wolff</b> wrote:</p>
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    <a href="https://git.reviewboard.kde.org/r/122109/diff/1/?file=342437#file342437line60" style="color: black; font-weight: bold; text-decoration: underline;">src/krecursivefilterproxymodel.cpp</a>
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     (Diff revision 1)

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   <td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">public:</pre></td>

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    <th bgcolor="#e9eaa8" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2">58</font></th>
    <td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">            <span class="n">success</span> <span class="o">=</span> <span class="n">QMetaObject</span><span class="o">::</span><span class="n">invokeMethod</span><span class="p">(</span><span class="n">q</span><span class="p">,</span> <span class="s">"_q_sourceDataChanged"</span><span class="p">,</span> <span class="n">Qt</span><span class="o">::</span><span class="n">DirectConnection</span><span class="p">,</span></pre></td>
    <th bgcolor="#e9eaa8" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">60</font></th>
    <td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">            <span class="k">static</span> <span class="k">const</span> <span class="n">QMetaMethod</span> <span class="n">m</span> <span class="o">=</span> <span class="n">q</span><span class="o">-></span><span class="n">metaObject</span><span class="p">()</span><span class="o">-></span><span class="n">method</span><span class="p">(</span><span class="n">q</span><span class="o">-></span><span class="n">metaObject</span><span class="p">()</span><span class="o">-></span><span class="n">indexOfMethod</span><span class="p">(</span><span class="s">"_q_sourceDataChanged(QModelIndex,QModelIndex,QVector<int>)"</span><span class="p">));</span></pre></td>
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  <pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">I'd personally move the indexOfMethod + method call into a static free function and use it here and below to share some code.</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;"><div class="codehilite" style="background: #f8f8f8"><pre style="line-height: 125%">QMetaMethod <span style="color: #0000FF">findMethod</span>(<span style="color: #008000; font-weight: bold">const</span> QObject<span style="color: #666666">*</span> object, <span style="color: #008000; font-weight: bold">const</span> <span style="color: #B00040">char</span><span style="color: #666666">*</span> signature)
{
    <span style="color: #B00040">int</span> idx <span style="color: #666666">=</span> object<span style="color: #666666">-></span>metaObject()<span style="color: #666666">-></span>indexOfMethod(signature);
    Q_ASSERT(idx <span style="color: #666666">!=</span> <span style="color: #666666">-1</span>);
    <span style="color: #008000; font-weight: bold">return</span> object<span style="color: #666666">-></span>metaObject()<span style="color: #666666">-></span>method(idx);
}

...

<span style="color: #008000; font-weight: bold">static</span> <span style="color: #008000; font-weight: bold">const</span> QMetaMethod method <span style="color: #666666">=</span> findMethod(q, <span style="color: #BA2121">"_q_sourceDataChanged(...)"</span>);
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<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Makes sense, I'll add that. Thanks!</p></pre>
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<p>- Volker</p>


<br />
<p>On January 17th, 2015, 5:22 p.m. UTC, Volker Krause wrote:</p>









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<div>Review request for KDE Frameworks and Milian Wolff.</div>
<div>By Volker Krause.</div>


<p style="color: grey;"><i>Updated Jan. 17, 2015, 5:22 p.m.</i></p>









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 <b style="color: #575012; font-size: 10pt;">Repository: </b>
kitemmodels
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
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   <pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">QMetaObject::invokeMethod calls QMetaObject::indexForMethod internally,
which is rather expensive. So look up the method once, and invoke it
via QMetaMethod directly.</p></pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
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   <pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Tested and measured with the KRFPM usage in GammaRay, saves about 5% of total application CPU cost according to callgrind.</p></pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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 <li>src/krecursivefilterproxymodel.cpp <span style="color: grey">(241f2e8e7e610c397bebc6608a64e4f12e570aea)</span></li>

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<p><a href="https://git.reviewboard.kde.org/r/122109/diff/" style="margin-left: 3em;">View Diff</a></p>






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