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Why Map Layer is slow in JavaScript API Environment?

Question asked by steven.lzhou on Jul 10, 2014
Latest reply on Jul 10, 2014 by THollingshead-esristaff

I used JavaScript API to build a web application for our organization.  The map layer (census tract which is our own map service) seems displaying in a very slow speed; the SAME map service works fine in our Flex-Viewer based application. My question is: what possible reason could make this happen? For example, in JavaScript API environment the layer is created as ArcGIS Feature layer; while in Flex-Viewer environment the layer is ArcGIS Dynamic layer.  Any hint will be helpful for us.  Thanks a lot!