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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_UNCONFIRMED "
title="UNCONFIRMED - Web view: Lag and CPU spikes when inserting, deleting, or reordering bulleted lists, numbered lists, and paragraphs"
href="https://bugs.documentfoundation.org/show_bug.cgi?id=123577">123577</a>
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<th>Summary</th>
<td>Web view: Lag and CPU spikes when inserting, deleting, or reordering bulleted lists, numbered lists, and paragraphs
</td>
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<th>Product</th>
<td>LibreOffice
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<th>Version</th>
<td>6.2.0.3 release
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<th>Hardware</th>
<td>All
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<th>OS</th>
<td>All
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<th>Status</th>
<td>UNCONFIRMED
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>Writer
</td>
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<th>Assignee</th>
<td>libreoffice-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>ahiijny@gmail.com
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<pre>Created <span class=""><a href="http://bugs.documentfoundation.org/attachment.cgi?id=149426" name="attach_149426" title="ODT document with laggy bulleted lists">attachment 149426</a> <a href="http://bugs.documentfoundation.org/attachment.cgi?id=149426&action=edit" title="ODT document with laggy bulleted lists">[details]</a></span>
ODT document with laggy bulleted lists
The bug occurs in this version:
Version: 6.2.0.3
Build ID: libreoffice-6.2.0.3-snap1
CPU threads: 4; OS: Linux 4.15; UI render: default; VCL: gtk3;
Locale: en-CA (en_CA.UTF-8); UI-Language: en-US
Calc: threaded
But not in this version:
Version: 6.0.7.3
Build ID: 1:6.0.7-0ubuntu0.18.04.2
CPU threads: 4; OS: Linux 4.15; UI render: default; VCL: x11;
Locale: en-CA (en_CA.UTF-8); Calc: group
I have a document with lots of bulleted lists under various headers.
Whenever I perform any of the following actions:
- insert a bulleted list item
- delete a bulleted list item
- reorder a bulleted list item using Alt + Shift + Up (move up) or Alt + Shift
+ Down (move down)
The following happens:
1. soffice.bin CPU usage jumps to 100% for about a second
2. the UI freezes for about a second
This happens in web view, but not in normal view.
This happens with numbered lists and paragraphs as well.
This is mildly annoying because if I need to insert a bunch of row items in
quick succession, the output becomes all garbled because of the lag (and
presumably because of how Ubuntu handles key presses). For example, if I type
"one <lf> two <lf> three <lf> four <lf> five <lf> six <lf> seven <lf> eight
<lf> nine <lf> ten" in quick succession, LibreOffice slowly finishes printing
this out on the screen, several seconds after I finish typing:
<span class="quote">> • one
> • tw
> • othe
> • reforu
> • fv
> • eisi
> • sxevneei
> • gh
> • tnn
> • eiten</span >
(do not want)
In web view: If I select everything in the document, cut, and paste, then
bullet lists become fast again. But after I save and then reopen the document,
it becomes laggy again.
The lag doesn't seem to occur if I create a new document with a fairly small
bulleted list. If I save and reopen, then it's still speedy and responsive. If
I paste in the 46 pages of bulleted lists from the laggy document, it's still
not laggy. But after I save, close, and reopen, then it becomes laggy.
Also:
- Lag occurs in Safe Mode
- Lag occurs whether or not OpenGL is enabled
- Lag occurs whether or not Navigator is open
- Lag occurs regardless of how long the document has been open (i.e. even after
the document has finished paginating)
I've attached a document where the lag happens for me. Excuse the screaming;
I've anonymized it with a's.</pre>
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