[DasIch]

LLVM is designed for languages that are compiled ahead of time like C and C++. In these cases it's not that important how much time and memory it takes to compile something.

If you're working on a JIT, this matters. A lot. Webkit isn't the first project has has used or worked with LLVM in this manner and abandoned it. PyPy has also investigated using LLVM and stopped doing that.

LLVM isn't bad, it just isn't good at solving this problem it wasn't designed for. If anything, I think it's remarkable LLVM has worked out as well for Webkit as it did.