I think this is wrong. Certainly the GCC toolchain spits out some remarkably mediocre code. RISC-V compressed is generally on par with Thumb2, and where it diff

I think this is wrong. Certainly the GCC toolchain spits out some remarkably mediocre code. RISC-V compressed is generally on par with Thumb2, and where it differed, Thumb2 seemed to be a tiny bit more dense. If you compare GCC/ARM with GCC/RISCV the difference isn't too great, but even the IAR ARM compiler gives you noticeable improvements over GCC/RISCV. And ARM's compilers are actually quite good with respect to code size; MUCH better than GCC/RISCV (or even GCC/ARM). That being said, were I to add some custom instructions, I would COMPLETELY prefer to do it with RISC-V than with ARM. [] Though the gcc/riscv toolchain is getting better pretty quickly.