This dataset provides the data of the case study on Apache Tomcat that was conducted as part of the bachelor thesis "Extending Peass to Detect Performance Changes of Apache Tomcat". The data was generated by Peass and the Peass-Ant plugin. Contents The dataset is divided into case_study_1v-100v.tar.xz and case_study_100v-200v.tar.xz. Both parts contain the following data: select/ - Results of regression test selection, especially: results/traceTestSelection_tomcat.json - Tests selected based on static code analysis and trace analysis 3 x measure_p*_100vm_400iter/ - Results of performance measurements, especially: clean/ - Mean of measurements per VM results/changes.json - Tests containing performance changes, computed with t-test rca_p3_100vm_400iter/ - Results of root cause analysis, especially: rca/tree/ - Measurements results per called method results/*/*.html - Visualization of root cause analysis Additionally, f1_score.tar.xz is included in this dataset, It contains heatmaps visualizing the F1-score that were used to compare different measurement configurations. Extraction of Data Move all .tar.xz files to an empty directory and execute for each file: tar -Jxf <file>