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List: kde-core-devel
Subject: Re: Review Request 113216: some little performance improvement for network kio
From: "Milian Wolff" <mail () milianw ! de>
Date: 2013-10-13 17:04:00
Message-ID: 20131013170400.23912.65868 () vidsolbach ! de
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Imo it's wrong to return const& in the first place. You can bind const& also to \
temporaries, see e.g. \
http://herbsutter.com/2008/01/01/gotw-88-a-candidate-for-the-most-important-const/
Anyhow, this may marginally improve performance (if the compiler is really not smart \
enough to do that automatically), as you'll save the atomic incr/decr related to the \
internal refcounting of QString.
Considering that someone has done the work here now, imo it's OK to commit it. Still, \
this is a micro-optimization. If the maintainer of this code feels against it, I \
could also understand that.
- Milian Wolff
On Oct. 12, 2013, 12:06 p.m., Jaime Torres Amate wrote:
>
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> http://git.reviewboard.kde.org/r/113216/
> -----------------------------------------------------------
>
> (Updated Oct. 12, 2013, 12:06 p.m.)
>
>
> Review request for KDE Runtime.
>
>
> Repository: kde-runtime
>
>
> Description
> -------
>
> A new check by cppcheck (avoid to call the copy constructor).
> networkUri.serviceName() and networkUri.serviceType() and networkUri.hostAddress() \
> return const QString&.
>
> Diffs
> -----
>
> kioslave/network/ioslave/networkslave.cpp a548f1a
>
> Diff: http://git.reviewboard.kde.org/r/113216/diff/
>
>
> Testing
> -------
>
>
> Thanks,
>
> Jaime Torres Amate
>
>
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This is an automatically generated e-mail. To reply, visit:
<a href="http://git.reviewboard.kde.org/r/113216/">http://git.reviewboard.kde.org/r/113216/</a>
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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;">Imo it's wrong to \
return const& in the first place. You can bind const& also to temporaries, \
see e.g. http://herbsutter.com/2008/01/01/gotw-88-a-candidate-for-the-most-important-const/
Anyhow, this may marginally improve performance (if the compiler is really not smart \
enough to do that automatically), as you'll save the atomic incr/decr related to \
the internal refcounting of QString.
Considering that someone has done the work here now, imo it's OK to commit it. \
Still, this is a micro-optimization. If the maintainer of this code feels against it, \
I could also understand that.</pre> <br />
<p>- Milian Wolff</p>
<br />
<p>On October 12th, 2013, 12:06 p.m. UTC, Jaime Torres Amate wrote:</p>
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<div>Review request for KDE Runtime.</div>
<div>By Jaime Torres Amate.</div>
<p style="color: grey;"><i>Updated Oct. 12, 2013, 12:06 p.m.</i></p>
<div style="margin-top: 1.5em;">
<b style="color: #575012; font-size: 10pt;">Repository: </b>
kde-runtime
</div>
<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;">A new check by cppcheck (avoid to call the copy constructor). \
networkUri.serviceName() and networkUri.serviceType() and networkUri.hostAddress() \
return const QString&.</pre> </td>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
<ul style="margin-left: 3em; padding-left: 0;">
<li>kioslave/network/ioslave/networkslave.cpp <span style="color: \
grey">(a548f1a)</span></li>
</ul>
<p><a href="http://git.reviewboard.kde.org/r/113216/diff/" style="margin-left: \
3em;">View Diff</a></p>
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