[gdal-dev] Fwd: GDAL open flags

[Michał Kowalczuk]

Thank you Laurentiu,

“*They exist for safety reasons (so you don't modify a dataset by mistake),
not as an optimization.” *

This is what I’m looking for. 😊

All the best,
Michal Kowalczuk

W dniu czw., 16 sty 2025 o 10:11 Laurențiu Nicola via gdal-dev <
gdal-dev at lists.osgeo.org> napisał(a):

> Hi Michał,
>
> Without knowing a lot about the underlying implementation, I would expect
> those flags to make no difference in performance.
> They exist for safety reasons (so you don't modify a dataset by mistake),
> not as an optimization.
>
>
> As for the docs, that seems expected. The documentation can't list all the
> things that a flag does not do.
>
> Laurentiu
>
> On Thu, Jan 16, 2025, at 09:16, Michał Kowalczuk via gdal-dev wrote:
>
> Any thoughts? :-)
>
> ---------- Forwarded message ---------
> Od: *Michał Kowalczuk* <michkowalczuk at gmail.com>
> Date: wt., 14 sty 2025 o 12:41
> Subject: GDAL open flags
> To: <gdal-dev at lists.osgeo.org>
>
>
> Hi gdal-group!
>
> 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.
>
> Best regards,
> Michał Kowalczuk
>
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