Re: using -O3 options with g++

[RRick]

Several companies I have worked at use -O3 optimization for production
code.  For production, they also minimize the debugging information to
-g1.  The -g1 option produces some useful symbol information for
backtracing and little else.

The downside of -O3 optimizations is that the debugger info can be
obscured.  When you step through the program with -O3 optimization in
a debugger, you can bounce around different parts of the program
without any idea of why it is happening.  For a debugging environment,
its best to turn up the debug level to -g3 and turn off the
optimizations to -O0.