I finally found the source of the problem.
I extracted the classpath from the maven-compiler-plugin by writing the
output (-X Otion) to a log-file and generated argument files for calling
javac from the commandline:
javac @options.txt @classes.txt
And the times are equal to maven:
Very slow with JDK 1.6 and fast compilation time with JDK 1.5.
The compile of Java 1.6 seems to have a problem when passing a very long
classpath or too many source-files (all with a full path).
What is the maven-compiler-plugin doing? Just calling javac on the
commandline?
Ant seems to be able to handle this better.....
j_ri wrote:
>
>
> I did some mor tests.
>
> First of all I tried with deactivated antivirus software. As expected this
> didn't solve the problem....
>
> What I wrote last time. That Maven builds a different classpath for JDK
> 1.5 and 1.6 is only true for Maven 2.07. Maven 2.1.0 built the same
> classpath with both versions of the JDK.
>
>
> Today I tried something different.
>
> I set JAVA_HOME to JDK 1.6, but configured the maven-compiler-plugin to
> use the javac.exe of JDK 1.5:
>
> <plugin>
>
> <groupId>org.apache.maven.plugins</groupId>
>
> <artifactId>maven-compiler-plugin</artifactId>
> <version>2.0.2</version>
> <configuration>
>
>
> <executable>C:\Programme\java\jdk1.5.0_11\bin\javac.exe</executable>
> <fork>true</fork>
> <verbose>true</verbose>
> <source>1.5</source>
> <target>1.5</target>
> <encoding>utf-8</encoding>
> </configuration>
> </plugin>
>
>
>
> The result was: the codes was compiled fast!
>
> For me it seems that there is a problem if Maven passes a very long
> classpath to the java-compiler of JDK 1.6.
>
> When I did my test with ant I just included a fileset with *.jar and not
> every single item of the classpath with full path.
>
> Does somebody have experience with quite big sourcetrees with a lot of
> dependencies in the classpath??
>
>
>
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