Anh <a...@pacbell.net> wrote on 11/02/2011 06:02:54 PM:
>
> Hi,
> in this AES code, I used Array[Array] instead of 2D array region.
> And I only time computation, and the performance on Java is much
> faster than X10 (Java-backend).
>
Taking a quick look at the code, most of the Array's have static types
like:
Array[Byte](1)
This masks the fact that the Array is rect & zeroBased, so statically we
can't use the most optimized array access. You instead nend to say Array
[Byte](1){rect,zeroBased}. This is kind of annoying to type, so we have a
typedef you can use instead: Rail[Byte]. I'd suggest changing that
throughout the code and then looking at the performance again.
Also, be sure to compile the x10 program with -O (this activates the
inliner and really helps Array-based code).
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