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Comment by metaphorm | Hacker News Reader

I was being snarky, but not trolling. I was very much trying to get at the same point you're getting at.

There is a trade-off between developer productivity and runtime performance. The author said that Go is appealing to people coming from a Python or Ruby background, which is a strong indicator that Go has fundamentally gotten the developer productivity side of the equation right.

So we should try and think about how the equation balances here. Is Go an order of magnitude slower than C++? Don't know. I think its not, though. My impression (which might be wrong, so please correct me if necessary) is that Go programs run approximately as fast as C++ programs that are written using C++ automatic memory features like smart pointers. Is Go an order of magnitude faster to develop than C++? Again, I'm not sure, but my perception is that it probably is. Python devs wouldn't be interested in it otherwise.

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I agree with you, and some actual facts can be provided. Just look at the benchmark game between Go and C++ in quad-core x64: http://benchmarksgame.alioth.debian.org/u64q/benchmark.php?t...

In average, C++ is three times faster than Go in all the tests. These benchmarks aren't definitive but you can assume that in general the difference in performance is much less than an order of magnitude.

Now, look at the same comparison between Go and Python3: http://benchmarksgame.alioth.debian.org/u64q/benchmark.php?t...

Python3 is in average 20 times slower than Go. And I love Python but Go isn't that much harder to use. It's quite a nice language, actually.

So, the exodus from Python to Go is very understandable, you gain a lot of performance without sacrificing much. And I think there's room for performance improvements in Go, perhaps in a couple of years C++ developers will make the transition. But I think that the real C++ killer is Rust. Time will tell.

Not at all. Go gives (a lot of) the advantages of python and not many of the costs. I would say that Go dominates python, giving the advantages of that language with few of the costs. Anything you can do in python can relatively easily be done in Go. Replacing dynamic typing with reflection seems to work pretty well.

It does not similarly dominate C++. C/C++ cannot be replaced by something like go for the very simple reason that it wouldn't work. Go itself depends on a C runtime and a C compiler written in C, even ignoring the operating system it has to run on (which also cannot run without a C/C++/assembly core). The same goes for languages like Java, Erlang, Haskell, ... (Java is particularly bad, since it has a huge complicated runtime which is almost completely C++)

After all, who will garbage-collect the garbage collectors ? (this is a simplification, the garbage collector is a major problem, but not the only one. There's dozens)

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