zentol commented on a change in pull request #17458:
URL: https://github.com/apache/flink/pull/17458#discussion_r727359834



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File path: docs/content/docs/flinkDev/building.md
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@@ -52,11 +52,19 @@ mvn clean install -DskipTests
 
 This instructs [Maven](http://maven.apache.org) (`mvn`) to first remove all 
existing builds (`clean`) and then create a new Flink binary (`install`).
 
-To speed up the build you can skip tests, QA plugins, and JavaDocs:
+To speed up the build you can:
+- use the build-in "fast" maven profile which will skip unit tests, 
integration tests, QA plugins, and JavaDocs.
+- active maven parallel build, e.g. "mvn -T 1C" means 1 thread per cpu core.
 
+The build script will be:
 ```bash
-mvn clean install -DskipTests -Dfast
+mvn clean install -DskipTests -Dfast -T 1C
 ```
+You can obviously control all skips manually too:
+```bash
+mvn clean install -DskipTests -Dskip.npm=true -Dcheckstyle.skip=true 
-Drat.skip=true -Dscalastyle.skip=true -Denforcer.skip=true 
-Dmaven.javadoc.skip=true -Djapicmp.skip=true -T 1C

Review comment:
       yes that is fine.




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