Measurement and Analysis of C and C++ Performance

As computer languages and architectures evolve, many more challenges are being presented to compilers. Dealing with these issues in the context of the Alpha Architecture and the C and C++ languages has led Compaq’s C and C++ compiler and engineering teams to develop a systematic approach to monitor and improve compiler performance at both run time and compile time. This approach takes into account five major aspects of product quality: function, reliability, performance, time to market, and cost. The measurement framework defines a controlled test environment, criteria for selecting benchmarks, measurement frequency, and a method for discovering and prioritizing opportunities for improvement. Three case studies demonstrate the methodology, the use of measurement and analysis tools, and the resulting performance improvements.