Twice the performance though? Likely in very specific benchmarks.
Keep in mind that the general performance of a given chip, and the performance of that chip in a thermally-constrained form-factor like a laptop, are very different things. Just because the i7-8557u is a decent CPU in a testbench, doesn't mean it didn't thermal-throttle itself under sustained load inside an MBP.
Comments
It's the Intel i7-8557u, which is pretty good. Twice the performance though? Likely in very specific benchmarks.
Still, this is pretty impressive, and I say this as someone who will never buy Apple hardware.
Keep in mind that the general performance of a given chip, and the performance of that chip in a thermally-constrained form-factor like a laptop, are very different things. Just because the i7-8557u is a decent CPU in a testbench, doesn't mean it didn't thermal-throttle itself under sustained load inside an MBP.