On the other hand, why is it wrong to say Ruby or Rails is slow? Especially in the context of Java or Go? What is wrong with accepting a simple ground truth that is compiled language is and will always be faster than an interrupted language, even with JIT.
For Rails I often compare to it another CRUD app, StackExchange [1] using ASP.net And the easiest real world comparison with Rails App would be Cookpad. Are we not seeing at least 10x difference if not more.
Is Rails fast enough? That depends on the context. Everyone's business model is different. It is almost definitely fast enough for most SaaS cases.
> What is wrong with accepting a simple ground truth
Where am I denying that? Saying that one of the most dynamic language is slower than Java or Go it's such a truism it's pointless.
What annoys me is the figures quoted. I can craft you benchmarks were Ruby is barely any slower than these two, or benchmark where it's 1000x slower. So which is the correct number to quote?
> For Rails I often compare to it another CRUD app, StackExchange [1] using ASP.net
This makes zero sense. You said:
> If you compare pure Ruby without Rails to fast language like Rust, Go and Java. It is probably closer to 10-20x.
> The 100x to 200x mainly comes from Rails.
So somehow you are blaming Rails for making Ruby 10 times slower whatever that means. That is a stupid statement that you took out of your hats and that doesn't reflect any reality. Please stop doing that, it's really unnerving for the people who maintain these projects.
For Rails I often compare to it another CRUD app, StackExchange [1] using ASP.net And the easiest real world comparison with Rails App would be Cookpad. Are we not seeing at least 10x difference if not more.
Is Rails fast enough? That depends on the context. Everyone's business model is different. It is almost definitely fast enough for most SaaS cases.
[1] https://stackexchange.com/performance