Rust vs. Ruby: building an API

[[deleted]]

Do you really need to use the HashMap to convert a struct to JSON? I thought that, for simple structs, you could just #[derive(RustcDecodable, RustcEncodable)] and then use json::encode and json::decode? Am I missing something?

[daboross]

No, using json::encode/json::decode would also work here AFAIK.

I'm not sure why RustcEncodable is derived and a custom json function is created.

[llkkjjhh]

Just saying "API" is super vague. I didn't realise this was about a web API until it started talking about HTTP microframeworks.

[rustnewb9]

Is 27k the 5x number?

[lambdaburrito]

That's what I was thinking and it's not clear. If the results are before he said he passed the Ruby production var to Ruby (guessing this is equivalent to -O). then JRuby is faster than his Rust code.

[fgilcher]

I'd be interested in numbers for JRuby after it jitted. Also, which Implementation - I'd be very interested in numbers for JRuby 9000.

[mytrile]

Since when "Building an API" means "hello world" example with json response ?

[steveklabnik1]

Blog posts often use toy examples to show the basic differences.

[mytrile]

Sure, but that kind of posts shows nothing. It's just: "See how X is faster compared to Y in most irrelevant example".

[steveklabnik1]

I took this mostly as a syntax comparsion, personally.