https://bugs.kde.org/show_bug.cgi?id=402361

            Bug ID: 402361
           Summary: Large search and replace operations cause Kate/KWrite
                    to hang for long time
           Product: kate
           Version: 18.12.0
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: search
          Assignee: kwrite-bugs-n...@kde.org
          Reporter: arco...@gmail.com
  Target Milestone: ---

SUMMARY
Large search and replace operations grind Kate/KWrite to a halt, sometimes
taking several minutes to become responsive again. 

STEPS TO REPRODUCE
1. Copy and paste this text into Kate or KWrite
https://pastebin.com/raw/a9NcnfBq
2. Replace " " with "," using plain text mode (10,403 replacements total)

OBSERVED RESULT
Application hangs for a very long time.  Upwards of 5+ minutes sometimes.  

EXPECTED RESULT
This should be a relatively quick process.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KDE Neon 5.14
(available in About System)
KDE Plasma Version: 5.14.4
KDE Frameworks Version: 5.53.0
Qt Version: 5.11.2

ADDITIONAL INFORMATION
Problem is identical in Kate and KWrite and has existed for as long as I can
remember.

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