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Improve search performance by a huge margin

Merged Waqar Ahmed requested to merge waqar/kate:search into master

This is just a proposed change. I was looking for the problem in BUG: 424199 when I realized that it was taking about 50 seconds to just do the search (which is unbearable). A quick hotspot profile shows that most of the time was being spent due to:

item->setCheckState(0, Qt::Checked);

With this change the search time is ~10 seconds now.

The file used for search is on: https://www.sogou.com/labs/resource/w.php with the name: SogouLabDic.dic
Search phrase: " "

My CPU: Core i5 4300U with 8 GB Ram

Downsides:

  • The UI is not as frequently updated so there is no smooth counter update.
Edited by Waqar Ahmed

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