https://bugs.kde.org/show_bug.cgi?id=478770

            Bug ID: 478770
           Summary: overview effect leaks memory
    Classification: Plasma
           Product: kwin
           Version: master
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: effects-overview
          Assignee: kwin-bugs-n...@kde.org
          Reporter: sit...@kde.org
  Target Milestone: ---

SUMMARY
title

STEPS TO REPRODUCE
1. open a bunch of windows (~ 70 should make the issue very prominent)
2. open htop
3. take note of memory used
4. win+w a bunch of times

OBSERVED RESULT
memory consumption keeps growing every other show/hide cycle by some 50-100MB

SOFTWARE/OS VERSIONS
Operating System: KDE neon Unstable Edition
KDE Plasma Version: 5.90.90
KDE Frameworks Version: 5.247.0
Qt Version: 6.6.1
Kernel Version: 6.2.0-39-generic (64-bit)
Graphics Platform: offscreen
Processors: 12 × AMD Ryzen 5 3600X 6-Core Processor
Memory: 31.2 GiB of RAM
Graphics Processor: AMD Radeon RX 5700 XT

ADDITIONAL INFORMATION
/proc/meminfo top deltas between two measurements with some show/hide cycles in
between:

  "Slab:": 4084,
  "SUnreclaim:": 4300,
  "Active(anon):": 9480,
  "AnonPages:": 17384,
  "DirectMap4k:": 26624,
  "Cached:": 620052,
  "Shmem:": 636524,
  "Inactive:": 640840,
  "Inactive(anon):": 641936,
  "Committed_AS:": 648580

It may be of note that when I strace kwin with -e %memory it produces an
unbalanced amount of mmap(, munmap( calls

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