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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_UNCONFIRMED "
   title="UNCONFIRMED - EDITING: Applying/undo formatting for a large document is a bit slower as it has been before"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=113139">113139</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>EDITING: Applying/undo formatting for a large document is a bit slower as it has been before
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>LibreOffice
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>5.1.0.3 release
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>UNCONFIRMED
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Writer
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>libreoffice-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>telesto@surfxs.nl
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Description:
Applying/undo formatting for a large document is a bit slower as it has been
before



Steps to Reproduce:
1. Open Writer
2. Disable automatic spell checking
3. Open <span class=""><a href="http://bugs.documentfoundation.org/attachment.cgi?id=136963" name="attach_136963" title="Example file">attachment 136963</a> <a href="http://bugs.documentfoundation.org/attachment.cgi?id=136963&action=edit" title="Example file">[details]</a></span>
4. Press CTRL+A and wait until loading is complete (CPU usage drops to +/-0)
5. Press CTRL+B and monitor the time until the CPU usage drops from max to 0
(for me 5 sec with LibO6 and 3 sec with a good build: for example commit
f8f8bdf24f7fc2f76810d36c4e1ce0e808c9509e)
6. Undo the change (CTRL+Z) With LibO6 6 seconds at max. With the good build 4)

Actual Results:  
Bold takes 5 sec with LibO6 
Undo takes 6 sec with LibO6

Expected Results:
Same as in f8f8bdf24f7fc2f76810d36c4e1ce0e808c9509e (or other previous
versions)
Bold in 3 sec
Undo in 4 sec


Reproducible: Always

User Profile Reset: No

Additional Info:
Found in:
Version: 6.0.0.0.alpha0+
Build ID: c5a93cad149618bbd43632f1660a558c34bdbf7e
CPU threads: 4; OS: Windows 6.3; UI render: default; 
TinderBox: Win-x86@42, Branch:master, Time: 2017-10-07_01:04:25
Locale: nl-NL (nl_NL); Calc: CL


User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:52.0) Gecko/20100101
Firefox/52.0</pre>
        </div>
      </p>


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