Index: Jenkinsfile
===================================================================
--- Jenkinsfile	(revision 7a230fdbf30cfbe8ae7776e8ce6798236d946161)
+++ Jenkinsfile	(revision cbef27bdc7d00e71d038d831d0fd681904bb5df8)
@@ -167,7 +167,4 @@
 }
 
-@Field PlotGroup CompileGroup = new PlotGroup('Compilation', 'seconds', true)
-@Field PlotGroup ConcurrencyGroup = new PlotGroup('Concurrency', 'nanoseconds', false)
-
 def publish() {
 	build_stage('Publish') {
@@ -179,12 +176,12 @@
 		}
 
+		def groupCompile = new PlotGroup('Compilation', 'seconds', true)
+		def groupConcurrency = new PlotGroup('Concurrency', 'nanoseconds', false)
+
 		//Then publish the results
-		do_plot('compile', CompilationGroup, 'Compilation')
-
-		do_plot('ctxswitch', ConcurrencyGroup, 'Context Switching')
-
-		do_plot('mutex', ConcurrencyGroup, 'Mutual Exclusion')
-
-		do_plot('signal', ConcurrencyGroup, 'Internal and External Scheduling')
+		do_plot('compile'  , groupCompile    , 'Compilation')
+		do_plot('ctxswitch', groupConcurrency, 'Context Switching')
+		do_plot('mutex'    , groupConcurrency, 'Mutual Exclusion')
+		do_plot('signal'   , groupConcurrency, 'Internal and External Scheduling')
 	}
 }