https://bugs.documentfoundation.org/show_bug.cgi?id=93261
Bug ID: 93261
Summary: Persistently high background CPU usage by soffice.bin
with high-word-count Writer document
Product: LibreOffice
Version: 5.0.0.5 release
Hardware: x86-64 (AMD64)
OS: Windows (All)
Status: UNCONFIRMED
Severity: major
Priority: medium
Component: Writer
Assignee: libreoffice-bugs@lists.freedesktop.org
Reporter: petercraigmartin...@gmail.com
Hardware & OS:
ThinkPad R61 with Intel Mobile Core 2 Duo T7500 @2.2GHz, NVIDIA Quadro NVS 140M
GPU, and 8GB of RAM, running fully up-to-date Windows 7 x64 SP1.
Problem with LibreOffice 5.0.0.5 x64:
When I have loaded a ~10MB, ~14,000-word Writer file with over 100 embedded
graphics formatted with 3 different custom frame styles, 19 different applied
paragraph styles, 29 different applied character styles, and a fair number of
instances of direct (non-style) formatting, and have finished letting it
repaginate and redo the word count, soffice.bin's background CPU usage, while
I'm not doing anything in LibreOffice or Writer, is 0%, as it should be.
When I have loaded a ~1.5MB, ~720,000-word Writer file with no embedded
graphics, no frame styles, no table of contents, no index, no index entries,
all paragraphs formatted in default paragraph style, all text formatted in
default text style, and all direct (non-style) formatting removed, and have
finished letting it repaginate and redo the word count -- for over an hour --
soffice.bin's background CPU usage, while I'm not doing anything in LibreOffice
or Writer, hovers at around 50%, driving my CPU and mainboard temperature up by
25°C.
The same problem occurs in LibreOffice 4.4.5.2 x86, but to a lesser degree:
soffice.bin's background CPU usage with a high-word-count Writer document
loaded is "only" 20%.
Unfortunately, the documents with which I tested this bug are proprietary and
confidential and I absolutely cannot post or share them. I am hoping that
someone else will have a nonconfidential high-word-count document on hand and
can confirm it without too much effort. If not, I will eventually try to find a
high-word-count document in the public domain, test it, and submit it if it
bears out my theory.
This bug was enough to cause me to downgrade to 4.4.5.2 x86, as I don't want to
subject my fan, thermal compound, CPU, and mainboard to high temperatures over
a long period of time, especially if I'm not getting any actual computational
work done in exchange.
I really hope this bug can be confirmed with generic documents and fixed, as I
quite liked some of the added features and (apparently) faster loading speed I
saw in LO 5.
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