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<p>Moises,</p>
<p>I've not reviewed in depth the MITAB driver, but reading from a
.tab file may require random access, and it is thus not surprising
that reading from a compressed file may exhibit poor performance.
You might try to set the VSI_CACHE config option / env variable to
YES, but no guarantee this will help for your use case.</p>
<p>Even<br>
</p>
<div class="moz-cite-prefix">Le 27/07/2022 à 11:39, Moises Calzado
via gdal-dev a écrit :<br>
</div>
<blockquote type="cite"
cite="mid:CAObRW4TKO05RkhMqVLXKa_PLH++6cs7rzWiXYVf-suU4XFcoZQ@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">
<div>Hi everyone!<br>
</div>
<div><br>
</div>
<div>We're using ogr2ogr to convert MapInfo TAB files into CSV
format using the following command:</div>
<div><br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">ogr2ogr
-f CSV -skipfailures -makevalid /vsistdout/ /vsizip/onLDU.zip
-oo AUTODETECT_TYPE=YES -lco CREATE_CSVT=YES > test_2.csv</blockquote>
<div><br>
</div>
<div>The file weights ≈200 MB and the process is taking too
much time to finish (almost 20 min), so we don't know if we're
doing something wrong regarding the command that we launch.</div>
<div> </div>
<img src="cid:part1.D4IQ8Zdu.wFrgB0PW@spatialys.com"
alt="Screenshot 2022-07-20 at 12.55.14.png" class=""
width="542" height="41"><br>
<div> </div>
<div>However, if we launch the same command against the .tab
file instead of using the vsizip virtual file system, it takes
less than 30 seconds to complete.</div>
<div><br>
</div>
<div>Have you ever seen something like this? Do you know if it's
expected that it takes too much time to process this kind of
files, or we're doing something wrong?</div>
<div><br>
</div>
<div>Thanks so much for your help in advance,</div>
<div>Regards!</div>
-- <br>
<div dir="ltr" class="gmail_signature"
data-smartmail="gmail_signature"> <strong>Moises Calzado</strong>
<p style="margin-bottom:4px;margin-top:4px"> Support Engineer
</p>
<p style="margin-bottom:20px;margin-top:4px"> (US) +1 917 463
3232 | (ES) +34 911 165 823 | <a
href="mailto:mcalzado@carto.com" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">mcalzado@carto.com</a>
</p>
<a
href="https://spatial-data-science-conference.com/2022/newyork/"
rel="nofollow" target="_blank" moz-do-not-send="true"> <img
src="https://storage.googleapis.com/carto-it-files/signature/SDSC-2022-NY_Signature-mini.jpg"
moz-do-not-send="true" width="516.656px" height="50"> </a>
</div>
</div>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
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</blockquote>
<pre class="moz-signature" cols="72">--
<a class="moz-txt-link-freetext" href="http://www.spatialys.com">http://www.spatialys.com</a>
My software is free, but my time generally not.</pre>
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