GCC 5.2 Compiler Benchmarks With ARM Cortex-A57 A Mixed Bag
SciMark's FFT test is also noticeably faster with GCC 4.9 and 5.2.
The other SciMark tests aren't indicating much change.
With John The Ripper and VP8 video encoding with libvpx there are two more losses for GCC 5.2.