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    <body><span class="vcard"><a class="email" href="mailto:vstuart.foote@utsa.edu" title="V Stuart Foote <vstuart.foote@utsa.edu>"> <span class="fn">V Stuart Foote</span></a>
</span> changed
          <a class="bz_bug_link 
          bz_status_UNCONFIRMED "
   title="UNCONFIRMED - Autofilter performance against undefined column headers regressed"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=133804">bug 133804</a>
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             <table border="1" cellspacing="0" cellpadding="8">
          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
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           <td style="text-align:right;">CC</td>
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           <td>erack@redhat.com, kohei@libreoffice.org
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            <b><a class="bz_bug_link 
          bz_status_UNCONFIRMED "
   title="UNCONFIRMED - Autofilter performance against undefined column headers regressed"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=133804#c12">Comment # 12</a>
              on <a class="bz_bug_link 
          bz_status_UNCONFIRMED "
   title="UNCONFIRMED - Autofilter performance against undefined column headers regressed"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=133804">bug 133804</a>
              from <span class="vcard"><a class="email" href="mailto:vstuart.foote@utsa.edu" title="V Stuart Foote <vstuart.foote@utsa.edu>"> <span class="fn">V Stuart Foote</span></a>
</span></b>
        <pre>(In reply to b. from <a href="show_bug.cgi?id=133804#c11">comment #11</a>)
<span class="quote">> a short look: 

> the __anonymous_databaserange_ used in your file covers nearly all rows,
> "Sheet1.A1:Sheet1.I1048542", 

> once you shrink this by deleting all rows below the data autofilter becomes
> fast again, 

> if 4.1 was faster with exact this file it likely has better management of
> empty columns or adapting the database range or similar ... 

> likely not a bug but 'use case'? 
> </span >

I guess that tracks--if I remove the Autofilter to add column labels and add
then add it back it is recalculating the range. 

So probably not the presence/absence of the column labeling?</pre>
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