(In reply to Martin Li��ka from comment #4) > That's not true, LTO creates a faster binaries with LTO. Of course it does, I'm just suspecting it won't be much faster. I'm not doubting the merits of LTO, although I personally prefer Clang's ThinLTO because of the smaller resource usage, and I hope that GCC will offer something similar sometime in the future. > > In addition, LLVM builds already take very long, and even just ThinLTO is > > going to make that worse. > > For now, I would not make the build even longer. I'm not sure if the "lamb" machines all have the same hardware, but the current build in devel:tools:compiler takes ~10000s, while with ThinLTO it takes ~15000s. I should compare the build times on the same machine though to be sure.