Early GCC 7 Compiler Benchmarks On Linux: Some Performance Improvements
The timed ImageMagick compilation is much faster with GCC 7.0 over GCC 6.2, but still not to the levels found in GCC 5.4.
But when compiling PHP, the compilation speed was about the same.
C-Ray's performance seems to regress on GCC 7.0.
Meanwhile Smallpt is much faster with GCC 7.
In other tests there is only minimal benefit of compiling the programs with GCC 7.