Profiling gcc itself

[Gary Funck]

Two more suggestions (off-topic to the profiling point, but on
topic to the idea of speeding up builds involving invocations
of GCC):

ccache: http://ccache.samba.org/

"ccache is a compiler cache. It speeds up recompilation by caching
previous compilations and detecting when the same compilation is
being done again.  Supported languages are C, C++, Objective-C
and Objective-C++."

distcc: http://code.google.com/p/distcc/

"distcc is a program to distribute builds of C, C++, Objective C or
Objective C++ code across several machines on a network. distcc
should always generate the same results as a local build, is
simple to install and use, and is usually much faster than a
local compile."