https://bugs.documentfoundation.org/show_bug.cgi?id=173501
Bug ID: 173501
Summary: slow import and high RAM use with 9MB .xlsx having 600
sheets inside
Product: LibreOffice
Version: 25.2.3.2 release
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: UNCONFIRMED
Severity: normal
Priority: medium
Component: Calc
Assignee: [email protected]
Reporter: [email protected]
Created attachment 208471
--> https://bugs.documentfoundation.org/attachment.cgi?id=208471&action=edit
the file I mentioned
I am attaching a sample .xlsx file used in my work.
The version of LibreOffice included in Debian 13 Stable takes 13 minutes to
open it on a single core of a [moderately modern] AMD Ryzen AI 7 350 processor
(with Radeon 860M graphics), and 86 minutes on a system with an [older] Intel
Core2 Duo E6400, whereas Microsoft Excel 2016 opens it within 20 seconds on
Windows 2019 with some older Xeon E2645.
Also, "soffice --calc" process grows from 870MB to 4..5GB of VIRT/RES size
during this import.
Most probably, Excel does not load all 600 sheets into RAM or render them at
once, as it takes <200MB of Commit/Working Set RAM.
The file itself is about 9 MB in size.
Most of its sheets were created by copying and modifying previous ones on a
daily basis over the past two years.
If needed, I may test the same file with later LibreOffice versions to see if
there were any improvements.
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