The Performance Between GCC Optimization Levels
Written by Michael Larabel in Software on 13 October 2012 at 08:09 PM EDT. Page 4 of 5. 23 Comments.
To no surprise, as additional optimizations are applied by the GNU Compiler Collection, the build time increases.
The multi-threaded C-Ray ray-tracer is another good test case for highlighting compiler flag differences.
The very small path-tracing benchmark (circa 100 lines of code) saw little improvement beyond the initial optimize level.