Node.js has jumped the shark

Also it seems a lot easier to "outsource" computationally intensive tasks to other processes with Node than with Rails. With node you can stall the response until you receive a result of the computation (within limits), and use the wait time for other tasks. With Rails if you do that, you block one thread of your limited pool of threads. As an example: with my first Heroku Rails app (free hosting) I discovered the pool of threads was one.

Thank you. I really find it hard to believe that the reaction to Ted's post was to mess around with Fib implementations rather than to just say, "use a background queue," and move on.

If Ted has a point at all, it could be that he thinks that people using nodejs don't realize they're running in a loop. Maybe that's fair.

OK. You have to realize what the community is and isn't. The community isn't every person with a blog. Those people are fanbois; and they exist everywhere.

You've got to filter the noise out. Don't submit every article about something to HN. Don't tell your friends "hey, read this article about a guy memoizing fib, completely missing the point that it was an example CPU-bound algorithm". This is all noise, people that don't know what they're talking about talking.

So, is accidentally blocking an issue in node? YUP! Is leaking space in Haskell something you should worry about? YUP! Is passing a string to a function that requires an int something to worry about in Ruby? YUP! Should you lose sleep at night worrying about whether your Java application is leaking memory? YUP! Should you have nightmares about input data causing your C program to write to memory it didn't allocate? YUP!

Why do you think writing working software is difficult? Because we all have phenomenal tools but are just morons? Nope, we're all morons and we have shitty tools too. All programming languages suck. So you must use them for their strengths, not their weaknesses.

Node.js' strength is that it was designed from the ground up to do everything that can be done asynchronously asynchronously. This is mostly due to the standard library and a bit of C, rather than something intrinsic to the runtime or language. The problems it runs into are CPU-bound computations. People are afraid to split applications into many processes and have some existing tool "scale" them as necessary. As a result, node.js does not work for them, because it doesn't have Java-style threads, which is the hammer they want to use to drive in their screws.

Anyway, I don't really even like node.js that much, but it just feels worth pointing out that no other language solves the denial-of-service problem. If you use preemptive multitasking, you eventually run out of memory for threads. If you use an event loop, blocking starves the other handlers. If you use multiple processes, your process table fills up. The question is: how are you going to deal with it. If you write a thread-based application, you have to figure out how to collect blocked threads (and hope the OS schedules your collector thread). If you write a process-based application, you have to figure out how to collect hung processes. If you write an event-based application, you have to figure out how to ensure you never block. In the end, all three problems are equally hard. It's just that node makes it easy to make 100000 connections hang without killing your Chrome session with your blog editor in it. Write a CGI script in C, use mpm_prefork or something, hit Apache with a million connections, and watch the OOM killer annihilate your system.

Programming is hard. Let's stop blogging.

But I don't, so instead of playing tough-guy and picking on random open source communities that don't want me, I get to write cool computer programs. Maybe we should all do the same.