A method is provided comprising: executing a first set of files, and collecting a first set of performance data; updating the first set of files to produce a second set of files; executing the second set of files and collecting a second set of performance data; identifying a first subset of the first set of performance data; identifying a second subset of the first set of performance data; calculating a score based on the first subset and the second subset, the score indicating a difference in resource consumption between one or more first thread instances that are instantiated using the first set of files and one or more second thread instances that are instantiated using the second set of files; and generating and outputting a debugging message based on the score, wherein the first thread instances and the second thread instances have the same entry function and the same opcode.