"Hello World" in Dart, compiled to JavaScript

#1

Post by brodd » Tue, Oct 11, 2011, 4:26 AM UTC

"Hello World" in Dart, compiled to JavaScript
gist.github.com

Re: "Hello World" in Dart, compiled to JavaScript

#2

Post by stephenr » Tue, Oct 11, 2011, 4:40 AM UTC

So, something that lets people who don't understand JavaScript "compile" some other language into JavaScript, is horribly inefficient. Wow, what a surprise.

Re: "Hello World" in Dart, compiled to JavaScript

#3

Post by beatpanda » Tue, Oct 11, 2011, 4:46 AM UTC

I don't understand why Dart is supposed to be good, someone please explain it to me like I'm an eight-year-old

Re: "Hello World" in Dart, compiled to JavaScript

#4

Post by tiles » Tue, Oct 11, 2011, 4:56 AM UTC

I wonder if the only speed benefits that the Dart VM gives would be able to be beaten out by a smart compiler. I know this is early for the cross-compilation code (it doesn't trim out anything it doesn't need here), but I hope this isn't what is ultimately used in that comparison.

Re: "Hello World" in Dart, compiled to JavaScript

#5

Post by Ralith » Tue, Oct 11, 2011, 5:00 AM UTC

stephenr wrote: post #2

So, something that lets people who don't understand JavaScript "compile" some other language into JavaScript, is horribly inefficient. Wow, what a surprise.

Do you mean to imply that the point of Dart is to be an easier to understand Javascript?

Re: "Hello World" in Dart, compiled to JavaScript

#6

Post by [deleted] » Tue, Oct 11, 2011, 5:01 AM UTC

tiles wrote: post #4

I wonder if the only speed benefits that the Dart VM gives would be able to be beaten out by a smart compiler. I know this is early for the cross-compilation code (it doesn't trim out anything it doesn't need here), but I hope this isn't what is ultimately used in that comparison.

[deleted]

Re: "Hello World" in Dart, compiled to JavaScript

#7

Post by korny » Tue, Oct 11, 2011, 5:14 AM UTC

Wow. Reminds me of GWT...

Re: "Hello World" in Dart, compiled to JavaScript

#8

Post by mhansen » Tue, Oct 11, 2011, 5:15 AM UTC

While this is hilarious, it's exactly fair. Dart is still in a very early tech preview, and they clearly haven't optimised code generation yet.

Right now, it's probably designed to be run through something like Closure Compiler, which removes dead code and minimizes the output.

Re: "Hello World" in Dart, compiled to JavaScript

#9

Post by swannodette » Tue, Oct 11, 2011, 5:16 AM UTC

I'll repeat what I said in the GitHub thread:

There's this interesting tool called Google Closure Compiler. It does dead code elimination. https://gist.github.com/1277285

Notice that this source is now 2000 lines of pretty printed JS. Given that anything interesting these days uses jQuery or Underscore.js clientside, and similar things serverside, this amount of JS for even Hello World is standard fare.

EDIT: To be clear, I don't really give two hoots about Dart ... yet. I use ClojureScript and since ClojureScript ships with a similarly rich API / data structure set, Google Closure Compiler is essential to keeping code size down.

Re: "Hello World" in Dart, compiled to JavaScript

#10

Post by geoffhill » Tue, Oct 11, 2011, 5:18 AM UTC

swannodette wrote: post #9

I'll repeat what I said in the GitHub thread: There's this interesting tool called Google Closure Compiler. It does dead code elimination. https://gist.github.com/1277285 Notice that this source is now 2000 lines of pretty printed JS. Given that anything interesting these days uses jQuery or Underscore.js clientside, and similar things serverside, this amount of JS for even Hello World is standard fare. EDIT: To be c…

I'm sorry, but 2,300 lines of code is in no way acceptable as a "dead code"-eliminated Hello World program. Not by a longshot.