Hi all,

I am currently working on google map javascript v3. I want to load
several directions on the map using lat and lng values from a
database. My problem is concerned with the speed with which this
processing takes place. The map might potentially contain 20,000
directions to be loaded and may be more. Which is the best way to pull
all the data from the database like using JSON or XML or something
other? Also is it a good idea to load all the directions at once on
the maps coz it might take a lot of loading time. Is there any way to
cluster the directions like markers?

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