Re: [computer-go] Score estimating

[Don Dailey <drd@xxxxxxx>]

Your numbers  seem amazing to me.   I've never seen  java described as
being  just  about  the same  speed  as  C++.   At  any rate,  C++  is
significantly slower than C code.

Of course,  as always, it depends  exactly on what you  are doing.  If
you can arrange your code such  that it spends most of it's time doing
calls  that are actually  written in  C anyway,  such as  library sort
routines in most languages, everything comes out the same.

If you look at the great  computer language shootout page, you can get
some comparisons, Java  doesn't compare at all in  speed to c++.  They
have the  usual disclaimers about the  usefulness of the  tests, but I
find  it as  good  as anything  else.   They take  a  huge variety  of
programming tasks,  implement them in many languages  and compare them
based on many metrics, such as speed of the application.

Some application  that is very simplistic  may very well  run the same
speed in most languages, such as  the sort example I gave or something
that is  heavily I/O bound.   Such applications are  generally running
routines built  in C  or spending most  of their time  doing operating
system calls.  Not things a good GO program would be doing.


- Don


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   >From my experience, Java is about 30% slower than C++ running in byte-code
   mode. However, if compiled Java program into native executables (not the
   simple exe wrapper), the gap is only at about 10%. Comparing the computer
   speed increase is much more than 10% in half year, and programming
   efficiency using Java is at least 30% higher than C++, write GO program in
   Java is a better choise than in C++.

   Weimin

   ----- Original Message ----- 
   From: "Don Dailey" <drd@xxxxxxxxxxxxxxxxx>
   To: <computer-go@xxxxxxxxxxxxxxxxx>
   Cc: <computer-go@xxxxxxxxxxxxxxxxx>
   Sent: Sunday, August 08, 2004 7:41 AM
   Subject: Re: [computer-go] Score estimating



   Chrilly,

   I'm no  expert on  this but I  think speed  is always critical  in any
   game.  Speed and memory are  to computers what intelligence is to man.
   ..
   I think what you  are seeing with Java is not that  it is suited to go
   programming, it's just very popular.  It's not particularly expressive
   OR fast, but it's a good  compromise in both directions.
   ..

   - Don

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