<table><tr><td style="">mwolff added a comment.
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<div style="font-style: normal;
padding-bottom: 4px;">In <a href="https://phabricator.kde.org/D11487#230791" style="background-color: #e7e7e7;
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<div style="font-style: normal;
padding-bottom: 4px;">In <a href="https://phabricator.kde.org/D11487#230755" style="background-color: #e7e7e7;
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color: rgb(107, 116, 140);"><p>yes, definitely don't roll your own lower_bound - use the STL provided one. Are you really compiling in release mode while measuring this? Also, I can only repeat myself in saying that you shouldn't use callgrind for performance measurements anymore, perf/hotspot should give you a much better view of where the CPU cycles are spent.</p></div>
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<p>One of the thinks I like about using callgrind, well, kcachegrind, is that I have the tree of calls to one method, that I don't have in perf report.<br />
As I said, I've been unable to compile hotspot yet, because I don't have the KF5 devel libraries installed from the distro, and I do not know how to specify an alternative directory in hotspsot cmake.</p></div>
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<p>Huh, just specify <tt style="background: #ebebeb; font-size: 13px;">-DCMAKE_INSTALL_PREFIX</tt> to the same path where you install the KF5 devel packages to, as a simple fix. Or try to set <tt style="background: #ebebeb; font-size: 13px;">CMAKE_LIBRARY_PATH</tt>, CMAKE_INCLUDE_PATH` and <tt style="background: #ebebeb; font-size: 13px;">CMAKE_PREFIX_PATH</tt> env vars. Or well, just use the appimage?</p>
<blockquote style="border-left: 3px solid #a7b5bf; color: #464c5c; font-style: italic; margin: 4px 0 12px 0; padding: 4px 12px; background-color: #f8f9fc;"><p>I'll try again with std::lower_bound, I'll take a look at folding, but I was unable to make it work last time.<br />
There is a big difference between lower_bound and this implementation: lower_bound does a < checking, while this does a <=.</p></blockquote>
<p>Do a lower_bound and then increment from there, or maybe try to use upper_bound? I'm not acquainted with the exact semantics you are looking for, but in general: Don't reinvent the wheel, but rather try to aggregate existing building blocks.</p></div></div><br /><div><strong>REPOSITORY</strong><div><div>R39 KTextEditor</div></div></div><br /><div><strong>REVISION DETAIL</strong><div><a href="https://phabricator.kde.org/D11487">https://phabricator.kde.org/D11487</a></div></div><br /><div><strong>To: </strong>jtamate, Frameworks, Kate<br /><strong>Cc: </strong>mwolff, cullmann, michaelh, kevinapavew, ngraham, demsking, sars, dhaumann<br /></div>