Method and system are provided for identifying a processing element for executing a computer program code module. The method includes: calculating a cyclomatic complexity score for the module; selecting one of a first or second processing element based on the calculated complexity score, the first processing element having a first architecture and the second processing element having a second architecture different from the first architecture, the first and second processing elements forming part of a heterogeneous computer system; running the module on the selected processing element to determine a first run time, and subsequently running the module on the non-selected processing element to determine a second run time; comparing the first and second run time to identify a shortest run time; and identifying a processing element producing a shortest run time as the processing element for executing the computer program code module.