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On Tue, 21 Feb 2006 16:42:51 +0100 |
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Karl Trygve Kalleberg <karltk@g.o> wrote: |
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> Excellent! We need all the help we can get. |
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Whatever I can do. |
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> > ... Then use gcj to create native |
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> > executables or libraries out of that jar files. Creating a database |
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> > via gcj-dbtool for jar / native code resolution. If possible Java to |
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> > native. |
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> |
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> The problem with this approach is your resulting programs will be |
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> potentially rather slow. |
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I got an example from OOo for jar to native compilation. |
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It may not be lightening-fast but ... |
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http://www.openoffice.org/issues/show_bug.cgi?id=54692 |
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... there it still speeds up the process. |
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What is done there: |
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* jars -> native libraries |
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* .java -> native binaray |
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What used to do a JVM with jars now does a native binary with jars |
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compiled to native libs. Time went down from 3h40 to 2h45. |
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I hit a oom-killer feature of gij - run as JVM - there on my 512MB ram |
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testbox. If you compile that Java source to native that oom-kill |
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vanishes. |
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Still, just an example. |
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> While gcj can indeed compile .class files (inside .jars) to binary, I've |
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> been told it can produce the most efficient of results. The source code |
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> is much richer in structure than the bytecode, and opens up for many |
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> effective optimizations which could only be reached through |
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> "idiom-recognition" (which doesn't exist for gcj yet, afaik) of the |
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> .class files. |
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In a perfect world ... ;) |
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> I suspect that you shouldn't give up on using gcj as a source compiler |
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> quite yet. This story may evolve with the whole ecj/gcjx/GPLv3 debate. |
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I use gcj successfully on my testbox. |
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As far as it is possible. And with ecj as bytecompiler all my ugly hacks will |
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be a part of the past. |
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Only trouble I have actually is eclipse-sdk. Another oom-killer at runtime. |
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May be I find the time to get it to native code somehow. |
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Regards, |
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Hanno |
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-- |
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