GWT and TypedArray

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So there's a new Javascript API, TypedArray. This provides efficient
fixed-type arrays for primitive data types. For example, Int8Array
stores only integers in the range -128..127.

It occurs to me that these would be ideal for GWT's implementations of
Java primitive object arrays. For example, the above Int8Array is
equivalent to byte[].

Does anyone know if GWT uses these if available? If not, are there any
plans to?

(This is important to me because I need fast primitive arrays; if GWT
already supports TypedArrays, then I don't need to wrap them myself.)

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