In general the compiler will select the most specific type it can - if you
write
Map map = new HashMap();
it will change that to
HashMap map = new HashMap();
as it is clear that the object can only be a HashMap at that location. In
other cases it may not be able to make that promotion, but there
But does the GWT compiler generate extra code to convert from Map to
HashMap?
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For anything going over the wire via RPC, yes.
For anything that stays within the client, it doesn't matter.
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thanks
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T
