Cannot add "-localWorkers" to GWT Compiler when using Eclipse?

[Edson Richter]

Hi,

I've GWT 2.4.0 installed in Eclipse Indigo. Everything works fine,
except that when I add "-localWorkers 4" into compilation
configuration, I get the error described below.

Compiler options:

-war war/secure -deploy ./deploy -extra ./extra -localWorkers 4 -
strict

Error during compilation:

Compiling module MyComponent
Compiling 2 permutations
Compiling permutation 0...
Process output
[ERROR] Could not create the Java virtual machine.
[ERROR] Unknown option or illegal argument: -logLevel.
[ERROR] Please check for incorrect spelling or review
documentation of startup options.
[ERROR]
Compiling permutation 1...
Compile of permutations succeeded
Linking into C:\Users\richter\workspace\...\MyComponent; Writing
extras to C:\Users\richter\workspace\...\extra\MyComponent
Link succeeded
Compilation succeeded -- 108,368s

And system stay calculating permutations on only one thread (my
machine has 8 physical cores, and only one is active during
compilation).

Can someone help me?

[Edson Richter]

Sorry for answering my own question. I've found that I need to add the
following to my VM arguments:

-
Dgwt.jjs.permutationWorkerFactory=com.google.gwt.dev.ThreadedPermutationWorkerFactory

Gain about 40% on compilation with 4 workers on 8 core machine ;-)

Edson.

[Roger Studner]

is thre any documentation out there, other than a really weak javadoc for the ThreadPermutationWorkerFactory that describes what this is/why it works (or doesn't) etc?

Roger

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[Joseph Lust]

LocalWorkers are also documented in the Maven-GWT-Plugin page:

http://mojo.codehaus.org/gwt-maven-plugin/compile-mojo.html

Joe

[Edson Richter]

In my humble opinion, would be better to have this very well
documented in GWT Compiling and/or GWT-Eclipse Plugin plugin pages.
Any chance to add a more detailed explanation at page
https://developers.google.com/web-toolkit/doc/latest/DevGuideCompilingAndDebugging#DevGuideJavaToJavaScriptCompiler
?

Thanks,

Edson.