Hi list
I'm wrinting a new style and I have to make choices between filters and
expressions. I was wondering which one would be more efficient in terms
of rendering performance : 2 rules with static style, or one rule with
dynamic style ?
One simple example would be (in ysld) :
Filter version, two rules :
rules:
- filter: ${railway = 'rail' AND tunnel <> 'yes'}
symbolizers:
- line:
stroke-color: '#999999'
rules:
- filter: ${railway = 'rail' AND tunnel = 'yes'}
symbolizers:
- line:
stroke-color: '#DDDDDD'
Expression version, one rule, expression in style :
rules:
- filter: ${railway = 'rail'}
symbolizers:
- line:
stroke-color: ${if_then_else(isNull(tunnel),'#999999','#DDDDDD')}
I have mixed feelings about both. I can write filter expressions more
easily because the syntax is simple, and I am not familiar with CQL. But
I like the compacity of the expression version better.
Thanks for your thoughts !
--
Arnaud
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