Parallel I/O continues to be a topic of active development. Recent years have seen the creation of many new options. Even with these new choices, certain factors remain constant. Parallel applications need a fast I/O subsystem.
This document explores methods for squeezing excess bytes out of simple programs. (Of course, the more practical purpose of this document is to describe a few of the inner workings of the ELF file format and the Linux operating system. But hopefully you can also learn something about how to make really teensy ELF executables in the process.)