ELF without COFF
Most implementations of ELF loaders are derived from COFF (Common Object File Format) loaders; they use the linking view of the ELF objects at load time. This is inefficient because the program loader must load the executable using sections. A typical program could contain a large number of sections, each of which would have to be located in the program and loaded into memory separately.
QNX Neutrino, however, doesn't rely at all on the COFF technique of loading sections. When developing our ELF implementation, we worked directly from the ELF spec and kept efficiency paramount. The ELF loader uses the execution view of the program. By using the execution view, the task of the loader is greatly simplified: all it has to do is copy to memory the load segments (usually two) of the program or library. As a result, process creation and library loading operations are much faster.