Bug 151461 - High CPU on Save
Summary: High CPU on Save
Status: NEW
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Calc (show other bugs)
(earliest affected) alpha0+
Hardware: All All
: medium normal
Assignee: Not Assigned
Depends on:
Blocks: Performance
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Reported: 2022-10-10 21:45 UTC by Pierre Fortin
Modified: 2023-04-03 20:04 UTC (History)
4 users (show)

See Also:
Crash report or crash signature:


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Description Pierre Fortin 2022-10-10 21:45:40 UTC
Linux-rpm_deb-x86_64@tb87-TDF (rpm) 	2022-10-10 08:56:40

Goal:  Split .tsv file into 100 tabs.

Loaded a sheet with 8,679,477 rows of 9 columns.  Column 1 contains numbers from 1 to 100.  Turned on auto-filter, selected rows containing "1", copied/pasted[1] into a new sheet(tab) named "1". Repeated for "2".  

Try to save as .ods, it appears to save -- progress bar suddenly stops moving and CPU climbs to nearly 800% without saving anything.

zip file (132139669; expands to 453287225) is at:

[1] Select "1", Ctrl+*, Ctrl+c, new tab & rename it, Ctrl+v.
    Want to repeat 99 more time for 2-100...

Operating System: Mageia 9
KDE Plasma Version: 5.25.90
KDE Frameworks Version: 5.98.0
Qt Version: 5.15.6
Kernel Version: 6.0.0-server-2.mga9 (64-bit)
Graphics Platform: X11
Processors: 20 × 12th Gen Intel® Core™ i7-12700K
Memory: 125.5 GiB of RAM
Graphics Processor: AMD Radeon RX 6600 XT
Manufacturer: Dell Inc.
Product Name: XPS 8950
Comment 1 m_a_riosv 2022-10-11 00:19:40 UTC
Reproducible, after a while LO crash, recover the file, but no crash report.
Version: (x64) / LibreOffice Community
Build ID: a7683a16e98def4198e1f74a93fecdaacbf639e7
CPU threads: 4; OS: Windows 10.0 Build 19044; UI render: Skia/Raster; VCL: win
Locale: es-ES (es_ES); UI: en-US Calc: CL threaded Jumbo