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ESRI point clustering example using featurelayer or querytask as input?

Question asked by schlot on Oct 5, 2012
Latest reply on Jan 20, 2016 by veena@hosur
I have tried to implement the ESRI forum example for clustering "Clustering with Javascript API" with mixed results.  Sometimes the cluster layer draws fine and sometimes it doesn't draw at all.  Even when it draws it's very slow and I'm not sure the users will be satisfied.  There seems to be mixed reviews on this.  The fact that it's display seem to be intermittent for me is enough for me to look to another clustering solution. 

More recently, the ESRI sample "Point Clustering" was posted. I like the way this looks, but I'm having a hard time understanding how to make it work with a layer as input, since my data is already in a service.  It seems like either I should add a function to step through all my features to create properly formatted input data, or I should edit the custom layer to handle features of a featureset or featurelayer instead.

Has anyone modified ESRI's point clustering example to use something besides the input JSON file?