Modifying compiled applications to monitor performance

A computer system for modifying a compiled application to monitor performance, the computer system comprising:

• one or more computer processors;
• one or more computer readable storage media;
• program instructions stored on the one or more computer readable storage media for execution by at least one of the one or more computer processors, the program instructions comprising instructions to:
• replace a request routing function of the compiled application with jump code that directs processing to a data collection function and backing up the request routing function;
• in response to receiving, during execution of the compiled application, an incoming request from a remote device for handling by the request routing function, execute the data collection function based on the jump code;
• collect, using the data collection function, data associated with the incoming request, the data comprising performance metrics;
• and
• call the backup of the request routing function using the data collection function to process the request and provide a response.

A computer program product for modifying a compiled application to monitor performance, the computer program product comprising one or more computer readable storage media collectively having program instructions embodied therewith, the program instructions executable by a computer to cause the computer to:

• replace a request routing function of the compiled application with jump code that directs processing to a data collection function and backing up the request routing function;
• in response to receiving, during execution of the compiled application, an incoming request from a remote device for handling by the request routing function, execute the data collection function based on the jump code;
• collect, using the data collection function, data associated with the incoming request, the data comprising performance metrics;
• and
• call the backup of the request routing function using the data collection function to process the request and provide a response.