<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  </head>
  <body>
    <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>
      <pre class="moz-quote-pre" wrap="">_______________________________________________
gdal-dev mailing list
<a class="moz-txt-link-abbreviated" href="mailto:gdal-dev@lists.osgeo.org">gdal-dev@lists.osgeo.org</a>
<a class="moz-txt-link-freetext" href="https://lists.osgeo.org/mailman/listinfo/gdal-dev">https://lists.osgeo.org/mailman/listinfo/gdal-dev</a>
</pre>
    </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>
  </body>
</html>