Hi Meine,
it's due to how cascading works, all possible combinations of rules must be
tried out to see
if they can work together and override each other, in order to translate
them in SLD, which
can only run a rule at a time, in order.

That's a combinatorial explosion, the processing time just gets out of
control, there is nothing
we can do about it I'm afraid, we already spent very large amounts of dev
time trying to make it
faster.

Typically if a CSS grows that large, you're not really leveraging cascading
anyways, so you can
enable the "flat" mode, which disables cross rule cascading fully, leaving
only nested rule overrides
operating:
https://docs.geoserver.org/stable/en/user/styling/css/cascading.html#the-flat-translation-mode

That should make translation time pretty quick

Cheers
Andrea

On Wed, Jan 20, 2021 at 6:41 PM Meine Toonen <meinetoo...@b3partners.nl>
wrote:

> Hi all,
>
> When using the css plugin in geoserver 2.18.0, I noticed when using very
> large styles geoserver hangs. No exceptions in the logfile.
> When testing, we added a style in the style editor and pressed Validate. A
> spinner occurs, and for some styles it did not stop spinning.
> A style with 98 lines did succeed (but it took more than 30 seconds)
> A style with 112 lines did not finish. When actually adding the style, the
> application server becomes unstable/unusable with a load of > 100.
>
> Attached is the used style.
> Is there any known issue with large styles, or a maximum size of the style?
>
> Thanks in advance!
> Met vriendelijke groet,
>
> Meine Toonen
> Software Engineer
>
> Telefoon Algemeen: +31 (0) 30 214 2081
> Telefoon Support: +31 (0) 30 214 2080
>
>
> B3Partners BV
> Zonnebaan 12c
> 3542 EC Utrecht
> www.b3partners.nl
>
> _______________________________________________
> GeoTools-GT2-Users mailing list
> GeoTools-GT2-Users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
>


-- 

Regards, Andrea Aime

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