STEPS TO REPRODUCE 1. Create a bigfile (15 MB or so with mixed content) and load it. 2. Search for a word (Ctrl+F) 3. Search/Replace (Ctrl+R) for a word; just do "find all" without "replace all" OBSERVED RESULT 2. takes minutes 3. reacts immediately EXPECTED RESULT 2. should react immediately, too, and was in a version some years ago SOFTWARE/OS VERSIONS Windows: macOS: Linux: openSUSE Leap 15.3 Linux/KDE Plasma: 5.18.6 (available in About System) KDE Plasma Version: KDE Frameworks Version: 5.76.0 Qt Version: 5.12.7 ADDITIONAL INFORMATION
Please update to a newer Kate / KDE frameworks version. Search performance was improved a lot in last few releases.