[enneff]

> "Run-time support and type information", why is it linked into a an executable that never allocates memory and does no introspection of any kind?

fmt.Print does use reflection.

Besides, bickering over the size of hello world is pretty pointless; better to compare the size of programs that actually do something.

We do recognise that Go binaries can and should be smaller, but probably not as small as you might hope.

https://github.com/golang/go/issues/6853

[eternalban]

It is a valid point considering the lack of dynamic linking. Go (as is) strongly suggests having lots of "small programs" compose a larger (modular) system on a node. So those 1.9MBs do add up.

[enneff]

This makes me laugh, considering at Google we regularly deploy statically linked C++ programs that are two orders of magnitude larger.

"You call that a big binary? THIS..." etc

[noir_lord]

I was generating 7-15Mb binaries out of Delphi in the late 90's (it had a similar kitchen sink approach) and it simply wasn't an issue then and it certainly isn't an issue now.

I'm actually racking my brain for a case where a 500kb vs 5Mb binary would be a deal breaker, outside of embedded stuff I can't think of much.

[hammerandtongs]

Just as a minor point -

One of the major blockers to clojure in android is that the lack of treeshaking/deadcode elimination makes for 10 second+ startup times in most environments.

[skybrian]

It matters when you have to download the file over a slow network.

"The ideal size is 10-15MB globally. Idea size for an app for tier 2/3 countries (like India) is below 5MB. 500MB+ is a non-starter. At 50MB+ the conversion rates fall off dramatically."

http://time.com/3589909/internet-next-billion-mobile/

[insertnickname]

Go binaries compress well in my experience. For example, I have a Go program that compiles to an 8.2 MB binary when compiled with gc 1.4.1. With bz2 compression, which takes about half a second on my box, it can be shrunk down to 2 MB.

[pjmlp]

If Google keeps Go away from Android, as first class language, only having the Go team doing NDK related support it doesn't really matter.

I don't foresee any changes on this regard at Google IO.

[eternalban]

From what I hear you have the funds and resources to operate at that scale.

[enneff]

Part of the reason Go exists is because of such issues. Believe me, it's not desirable.

My point is, on typical machines today, even a 10mb binary is not an issue at all.

[swetland]

And this is a reason why, though I like the language, it's pretty useless for embedded work. Not all the world is lacking in resource constraints.

[arsv]

> Besides, bickering over the size of hello world is pretty pointless; better to compare the size of programs that actually do something.

It is not about the size of hello world executable, that is just a symptom. A code smell if you like. There is something badly broken in the dead code (or dead data) elimination area. And I hope that code is in fact dead, because if it is not, add code generation to the list of smelly things.

What I suspect I see here is a kind of C++ vtable problem built deep into the language design somewhere. And the reaction is, let's talk about large executables so that it would kinda become not so visible. Or maybe let's take a look at glibc, because glibc is definitely a paragon of clear design befitting a new language.

> fmt.Print does use reflection

There are two problems with this. The lesser one is why does it need reflection to print a string. The bigger one is why do I see about 600 reflect.* entries in the resulting ELF instead of a single one for the string type.

[enneff]

> The bigger one is why do I see about 600 reflect. entries in the resulting ELF instead of a single one for the string type.*

There is definitely work that can be done to improve dead code elimination in the Go tool chain. The transition to Go will make this easier to achieve.

> What I suspect I see here is a kind of C++ vtable problem built deep into the language design somewhere.

Don't suspect. Dig into the problem and make some informed commentary. Idly speculating on HN is just spreading FUD, and benefits no-one.

You should read about Go's implementation of interfaces. It's not the same as C++'s vtable issue. http://research.swtch.com/interfaces

[mholt]

> The lesser one is why does it need reflection to print a string.

It doesn't print just strings. It can print anything. http://golang.org/src/fmt/print.go?s=6420:6467#L221

After doing your research, you're welcome to submit a magical CL and PR that brings down the binary sizes, then you won't need to argue anymore.

[arsv]

> After doing your research, you're welcome to submit a magical CL and PR that brings down the binary sizes, then you won't need to argue anymore.

The original link is titled "The State of Go". The first thing I want to know about a state of a new language is whether it works. Then how well it works. Then, maybe, how to fix it and which VCS to use. There is an issue I think is within the range of these two questions, but it is not even mentioned there.

So to make life a bit easier for people who like me expect that issue to be discussed first, I posted a comment summarizing (in my opinion) the state of Go.

My thoughts on how to fix it are hardly relevant to the current state of Go.

> It doesn't print just strings. It can print anything.

The fact it is just a string should be statically (build-time) inferable in a strongly-typed language. Reflection, at least as I understand it, implies run-time type information. So the question does make sense. Yes, I understand why it may be needed for a particular implementation of printf, this is why I called it a lesser issue.

[enneff]

> I posted a comment summarizing (in my opinion) the state of Go.

Not trying to be rude, but your uninformed opinion is less valuable than you think.

[frowaway001]

Wow, Googlers being Googlers.