Well, fair in a sense that we'd compare which implementation is more efficient. Surely, ClickHouse is faster, but is it because it's using actually superior algorithms or is it just that it executes stuff in parallel by default? I'd like to believe it's both, but without "user%" it's hard to tell
Not necessarily, that really depends on what you mean by fast. Cars definitely go higher in top speed than bikes do for example. If I'm not mistaken, racing electric cars also accelerate comparable or faster than bikes. A bike can generally go around a track faster than a car, but that only holds true in dry conditions. Etc, many ways to define fast and what you actually mean.