Compile-time Optimization and Customization in Java and C + MPI

To achieve both of runtime efficiency and maintainability of large-scale and complicated software especially with dynamicity, portability, and concur-rency, programmers have strong desire to customize and optimize their soft-ware as they need. For exmaple, they may need to perform platform-specific optimizations so as to adapt their software from embedded systems and hand-held devices all the way up to large-scale servers and massively paral-lel processors (MPPs). Also, they may need to perform application-specific optimizations such as selection of compilation strategies, runtime partial evaluation, as well as application-specific idiom recognition. However, such customizations and/or optimizations generally require complicated program transformation which could only be done by highly-experienced program-mers or compiler experts. These situations lead us to the necessity to de-velop more flexible approaches to make users-demanded customizations and optimizations easier