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What is better between JSP and velocity in - Performance - Ease of use - Ease of creating reusable components - Availability of open source 3rd parties - IDE support
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I don't know whether Velocity can be able to compete with JSP in all aspects but Velocity is faster and nuch easier.Efficiency of Velocity is 35 to 45% more if it is complicated webpages it may be reduced but still it is 5% more than JSP.
Velocity or even better FreeMarker. In JSP you cannot have runtime dispatch for pojo hierarchies and everything is statically typed which is a pain. Moreover if you create many JSP2.0 custom tags (say more than 100-150) then your development-deployment cycle will slow down heavily due to inefficiencies of Jasper to resolve dependencies efficiently.
On the other hand JSP has great tool support.
slow JSP compilation references:
http://www.mailinglistarchive.com/users@tomcat.apache.org/msg10786.html
http://marc.info/?l=tomcat-dev&m=119377083422720&w=2