<div><div dir="auto">Thank you <span style="font-family:arial">Laurentiu,</span><div dir="auto"><span style="font-family:arial;font-size:16px;font-style:normal;font-weight:400;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;float:none;display:inline!important;color:rgb(0,0,0)"><br></span></div><div dir="auto"><span style="font-family:arial;font-size:16px;font-weight:400;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;float:none;display:inline!important;color:rgb(0,0,0)">“<span style="font-family:arial;background-color:rgba(0,0,0,0);border-color:rgb(0,0,0);color:rgb(0,0,0)"><i style="font-family:arial">They exist for safety reasons (so you don't modify a dataset by mistake), not as an optimization.” </i></span><div dir="auto" style="font-style:normal;font-family:arial"><span style="font-family:arial;font-size:16px;font-style:normal;font-weight:400;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;float:none;display:inline!important;background-color:rgba(0,0,0,0);border-color:rgb(0,0,0);color:rgb(0,0,0)"><br></span></div><div dir="auto" style="font-style:normal;font-family:arial"><span style="font-family:arial;font-size:16px;font-style:normal;font-weight:400;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;float:none;display:inline!important;background-color:rgba(0,0,0,0);border-color:rgb(0,0,0);color:rgb(0,0,0)">This is what I’m looking for. 😊</span></div><div dir="auto" style="font-style:normal;font-family:arial"><span style="font-family:arial;font-size:16px;font-style:normal;font-weight:400;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;float:none;display:inline!important;background-color:rgba(0,0,0,0);border-color:rgb(0,0,0);color:rgb(0,0,0)"><br></span></div><div dir="auto" style="font-style:normal;font-family:arial"><span style="font-family:arial;font-size:16px;font-style:normal;font-weight:400;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;float:none;display:inline!important;background-color:rgba(0,0,0,0);border-color:rgb(0,0,0);color:rgb(0,0,0)">All the best,</span></div><div dir="auto" style="font-style:normal;font-family:arial"><span style="font-family:arial;font-size:16px;font-style:normal;font-weight:400;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;float:none;display:inline!important;background-color:rgba(0,0,0,0);border-color:rgb(0,0,0);color:rgb(0,0,0)">Michal Kowalczuk </span></div></span></div></div></div><div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">W dniu czw., 16 sty 2025 o 10:11 Laurențiu Nicola via gdal-dev <<a href="mailto:gdal-dev@lists.osgeo.org" target="_blank">gdal-dev@lists.osgeo.org</a>> napisał(a):<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><u></u><div><div style="font-family:Arial">Hi Michał,<br></div><div style="font-family:Arial"><br></div><div style="font-family:Arial">Without knowing a lot about the underlying implementation, I would expect those flags to make no difference in performance.<div style="font-family:Arial"><span style="font-family:arial;font-size:16px;font-style:normal;font-weight:400;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;float:none;display:inline!important;background-color:rgba(0,0,0,0);border-color:rgb(0,0,0);color:rgb(0,0,0)">They exist for safety reasons (so you don't modify a dataset by mistake), not as an optimization.</span></div><br></div><div style="font-family:Arial"><br></div><div style="font-family:Arial">As for the docs, that seems expected. The documentation can't list all the things that a flag does not do.<br></div><div style="font-family:Arial"><br></div><div style="font-family:Arial">Laurentiu<br></div></div><div><div style="font-family:Arial"><br></div><div>On Thu, Jan 16, 2025, at 09:16, Michał Kowalczuk via gdal-dev wrote:<br></div></div><div><blockquote type="cite" id="m_-8925303693488089129m_1584548399918176929qt"></blockquote></div><div><blockquote type="cite" id="m_-8925303693488089129m_1584548399918176929qt"><div dir="ltr"><div>Any thoughts? :-)<br></div><div><br></div><div><div dir="ltr"><div>---------- Forwarded message ---------<br></div><div>Od: <b dir="auto">Michał Kowalczuk</b> <span dir="auto"><<a href="mailto:michkowalczuk@gmail.com" target="_blank">michkowalczuk@gmail.com</a>></span><br></div><div>Date: wt., 14 sty 2025 o 12:41<br></div><div>Subject: GDAL open flags<br></div><div>To:  <<a href="mailto:gdal-dev@lists.osgeo.org" target="_blank">gdal-dev@lists.osgeo.org</a>><br></div></div><div><br></div><div><br></div><div dir="ltr"><div>Hi gdal-group!<br></div><div><br></div><div>Does GDAL_OF_READONLY / GDAL_OF_UPDATE have any impact on performance, especially when reading common vector files (shp, gpkg, gml)? There is no recommendation on this in docs.<br></div><div><br></div><div>Best regards,<br></div><div>Michał Kowalczuk<br></div></div></div></div></blockquote></div><div><blockquote type="cite" id="m_-8925303693488089129m_1584548399918176929qt"><div>_______________________________________________<br></div><div>gdal-dev mailing list<br></div><div><a href="mailto:gdal-dev@lists.osgeo.org" target="_blank">gdal-dev@lists.osgeo.org</a><br></div><div><a href="https://lists.osgeo.org/mailman/listinfo/gdal-dev" target="_blank">https://lists.osgeo.org/mailman/listinfo/gdal-dev</a><br></div><div><br></div></blockquote><div style="font-family:Arial"><br></div></div>_______________________________________________<br>
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