If they didn't implement those benchmarks (at least in simulation, like they benchmarked everything else) before releasing the spec, then they have nothing but

If they didn't implement those benchmarks (at least in simulation, like they benchmarked everything else) before releasing the spec, then they have nothing but handwaving and wishful thinking in saying this issue can be solved by op fusion. The reality is that they optimized for 1980s-style C programming without noticing that this isn't the 1980s any more.