The slowest is three times slower than the fastest! That’s not almost identical at all, and could easily be the difference between a useable interface and an unbearable one...
It could be. And when I have evidence that user experience is affected, I'll care about the difference. But what if it's 1ms vs 3ms? Or 3ms vs 9ms? And the 9ms time is a much more expressive, productive, high-level language?
I'm not going to care about the difference just because "omg one number is 3x another number!?!"
I was referring to response time in a GUI app -- 9ms is undetectable.
Again, if you have a reason the speed matters, then it matters. The specific numbers here are not relevant to my argument, which boils down to: being "slow", in and of itself, is meaningless.
I'm not going to care about the difference just because "omg one number is 3x another number!?!"