Re: [X10-users] AES in X10

[Anh Trinh]

Hi, Changed Array[Byte] to Rail[Byte], I can see performance boost, but Java is still 2x faster File: 21M X10:  25 seconds Java: 17 seconds There are places I do this: val tmp:Rail[Rail[Byte]]= new Array[Array[Byte](1){rect,zeroBased,rail}](0..(Nb*(Nr+1)-1)); for(var i:int=0; i<tmp.size; i++){ tmp(i) = new Array[Byte](0..3); } wonder if this will hit performance, I tried Array constructor    new Array[Rail[Byte]](0..(Nb*(Nr+1)-1), i:Point(1)=>new Array[Byte](0..3)); and other variations, but not successful.  Any suggestion for more performance? Thanks

AES.x10
Description: Binary data

On Nov 2, 2011, at 6:34 PM, David P Grove wrote: Anh <a...@pacbell.net> wrote on 11/02/2011 09:12:52 PM: > > looking at library API, I don't see Rail.  Does latest version have > this feature?  I saw this from previous version Yes.  It's now a typedef for Array[T]{rank==1,zeroBased,rect}.  In older versions of X10 it was a special, hand-optimized class distinct from Array. The tool that generates the library documentation is based on javadoc and doesn't quite understand X10's typedefs.  If you look in x10.lang.Rail.x10 you'll find it: [dgrove@wahtutca lang]$ more Rail.x10 /*  *  This file is part of the X10 project (http://x10-lang.org).  *  *  This file is licensed to You under the Eclipse Public License (EPL);  *  You may not use this file except in compliance with the License.  *  You may obtain a copy of the License at  *      http://www.opensource.org/licenses/eclipse-1.0.php  *  *  (C) Copyright IBM Corporation 2006-2010.  */ package x10.lang; public type Rail[T] = Array[T]{self.rank==1,self.zeroBased,self.rect,self.rail}; --dave

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