Benchmarks Of GCC 4.5.0 Compiler Performance
There was a regression hurting the multi-threaded C-Ray ray-tracing engine in GCC 4.4 that caused it to run noticeably slower than GCC 4.3, but fortunately that appears to be mostly cleared up with the 4.5.0 release.
The OpenMP-driven GraphicsMagick application is running slower with GCC 4.4/4.5 when using the HWB Color Space conversion task.
Image resizing in GraphicsMagick is also slower with the 4.4/4.5 generated binaries.
The image sharpening performance though is marginally faster when built with GCC 4.4/4.5.