[m-rev.] diff: update README.Java

[Peter Wang]

Branches: main

README.Java:
        Make the warning less scary.

        Preempt complaints about performance on short programs.

Index: README.Java
===================================================================
RCS file: /home/mercury1/repository/mercury/README.Java,v
retrieving revision 1.13
diff -u -p -r1.13 README.Java
--- README.Java	14 Aug 2009 06:34:03 -0000	1.13
+++ README.Java	25 Sep 2009 07:33:11 -0000
@@ -27,10 +27,11 @@ In order to try this system you will nee
 	  If you're reading this file from somewhere other than the
 	  Mercury distribution, try the Mercury homepage at
 	  	<http://www.mercury.csse.unimelb.edu.au>
+
 WARNING
 
-Please note that the Java backend is still an experimental feature.  It
-is still quite buggy in places and is sometimes completely broken. 
+Please note that the Java backend is still an experimental feature.
+It works quite well now but is not as mature as the C backends.
 
 -----------------------------------------------------------------------------
 
@@ -82,6 +83,12 @@ Language Reference Manual, which you can
 	
      <http://www.mercury.csse.unimelb.edu.au/information/documentation.html>
 
+Some short programs may run much more slowly in the Java grade than the C
+grades.  The runtime is probably dominated by Java class loading and running
+in interpreted mode.  A long running program should perform reasonably well
+with a Just-In-Time compiler.  It may also be possible to use an Ahead-Of-Time
+Java compiler, but we haven't tried that yet.
+
 -----------------------------------------------------------------------------
 
 RESOURCES

--------------------------------------------------------------------------
mercury-reviews mailing list
Post messages to:       mercury-reviews at csse.unimelb.edu.au
Administrative Queries: owner-mercury-reviews at csse.unimelb.edu.au
Subscriptions:          mercury-reviews-request at csse.unimelb.edu.au
--------------------------------------------------------------------------