Compiler Benchmarks Of GCC, LLVM-GCC, DragonEgg, Clang Written by Michael Larabel in Software on 8 November 2010 at 05:00 AM EST. Page 1 of 7. 62 Comments. LLVM 2.8 was released last month with the Clang compiler having feature-complete C++ support, enhancements to the DragonEgg GCC plug-in, a near feature-complete alternative to libstdc++, a drop-in system assembler, ARM code-generation improveme