I updated to Performance Plugin version 1.15 that added a new pipeline step performanceReport and the following problems occured (see also Github #73):

1. Missing PerformanceTrend in Job-View
   
2. Duplicated Performance Report in Build-View (see attachment)
   
3. Snippet generator cannot handle double values of relative thresholds

   performanceReport compareBuildPrevious: false, configType: 'MRT', errorFailedThreshold: 0, errorUnstableResponseTimeThreshold: '', errorUnstableThreshold: 0, failBuildIfNoResultFile: false, modeOfThreshold: false, modePerformancePerTestCase: true, modeThroughput: false, nthBuildNumber: 0, parsers: [], relativeFailedThresholdNegative: <object of type java.lang.Double>, relativeFailedThresholdPositive: <object of type java.lang.Double>, relativeUnstableThresholdNegative: <object of type java.lang.Double>, relativeUnstableThresholdPositive: <object of type java.lang.Double>
   

   I had to replace <object of type java.lang.Double> manually by the correct double values.