Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/16871#discussion_r100287048
--- Diff: build/mvn ---
@@ -22,7 +22,7 @@ _DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
# Preserve the calling directory
_CALLING_DIR="$(pwd)"
# Options used during compilation
-_COMPILE_JVM_OPTS="-Xmx2g -XX:MaxPermSize=512M
-XX:ReservedCodeCacheSize=512m"
--- End diff --
I think it was there to speed compilation up. Unless you want to do a
controlled experiment to make sure it doesn't regress, I'd just leave it there.
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