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Objective C

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The Objective-C environment, a growing collection of tools and reusable components (Software-ICs) for large-scale production system-building is discussed. Its goal is to make it possible for its users to build software systems in the way that hardware engineers build theirs, by reusing Software-ICs supplied by a marketplace in generic components rather than by building everything from scratch. The environment is based on conventional technology (C and Unix-style operating systems), which it includes and extends. The extensions presently include a complied and an interpreted implementation of Objective-C (an object-oriented programming language based on C) and several libraries of reusable components (ICpaks).

Smartphones provide applications that are increasingly similar to those of interactive desktop programs, providing rich graphics and animations. To simplify the creation of these interactive applications, mobile operating systems employ highlevel object-oriented programming languages and shared libraries to manipulate the device's peripherals and provide common userinterface frameworks. The presence of dynamic dispatch and polymorphism allows for robust and extensible application coding. Unfortunately, the presence of dynamic dispatch also introduces significant overheads during method calls, which directly impact execution time. Furthermore, since these applications rely heavily on shared libraries and helper routines, the quantity of these method calls is higher than those found in typical desktop-based programs. Optimizing these method calls centrally before consumers download the application onto a given phone is exacerbated due to the large diversity of hardware and operating system versions that the application could run on. This paper proposes a methodology to tailor a given Objective-C application and its associated device-specific shared library

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