https://bugs.documentfoundation.org/show_bug.cgi?id=99938
Bug ID: 99938
Summary: Calc uses 100% CPU and leaks memory when calculating
moving average of full column
Product: LibreOffice
Version: 5.1.3.2 rc
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: medium
Component: Calc
Assignee: [email protected]
Reporter: [email protected]
Created attachment 125159
--> https://bugs.documentfoundation.org/attachment.cgi?id=125159&action=edit
CSV file used to reproduce the problem
When calculating a moving average for the attached CSV file, libreoffice uses
100% CPU, and uses increasing amounts of memory until I kill it.
Steps to reproduce:
1) Open the attached CSV file
2) Select both columns
3) Data -> Statistics -> Moving Average
- Input range should be `$scores2.$A$1:$B$1048576`
- Results To should be `$C$1`
- Grouped by columns
- Interval 20
Clicking OK will then cause 100% CPU usage on one core, and gradually more
memory usage. It managed to take 10 minutes on my machine and use 2GB of RAM
before I killed it.
If I select only the 142 rows of data then it calculates it almost instantly.
Expected behaviour:
The average should ignore the empty rows, and give a result as swiftly as just
selecting the top 142.
Libreoffice Version: LibreOffice 5.1.3.2 10m0(Build:2)
Operating System: Arch Linux
Kernel: Linux 4.5.4-1-ARCH x86_64
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