Clojure and Haskell both include STM systems for controlled access to shared resources. There's a Haskell distribution known as Glasgow Distributed Haskell (GdH), which provides facilities for small-scale distributed programming. Clojure can achieve the same effect through the use of third-party libraries (JMS, JGroups, Terracotta, etc...).
I started learning Haskell before coming to Clojure, and from my experience, Clojure has a much lower barrier to entry. Haskell is an extremely dense language with a good number of syntax rules and rigorous type system. Clojure, being a lisp, is very easy to grok syntactically and easier to learn IMO. Haskell has been around for almost 20 years. The compiler is extremely advanced, and programs have a reputation for blinding speed. Clojure runs on the JVM, so you get the benefit of your programs running almost everywhere without any fancy deployments and get all the standard libraries that Java includes. I spent a few months learning Erlang last year, and I have to say that it's almost like it's own operating system. It's extremely good at what it does, but it's use cases are targeted towards the development of distributed network applications with a high level of fault tolerance. If you're writing a server using a custom protocol and need to spread it across multiple nodes and use supervisor trees to guarantee availability, Erlang is for you. In order to quickly schedule thousands of micro-threads, it makes some sacrifices at the scheduler level. This means that things like I/O are going to be less performant than with other languages. Comparing the three languages, I'd look at them as follows. 1) Haskell - mathematics oriented, high performance, high learning curve 2) Clojure - general purpose lisp, JVM, concurrency oriented 3) Erlang - network oriented, high availability, distributed They're all worth learning. Which is best suited really depends on what you're trying to do. I'd suggest the following resources. Haskell - "Real World Haskell" (available for free online) Clojure - "Programming Clojure" (available through the pragmatic programmers) Erlang - "Programming Erlang" (also available through the pragmatic programmers) -Travis On Sep 24, 10:24 am, mmwaikar <mmwai...@gmail.com> wrote: > With respect to Stuart's comment above - "Erlang is designed for > distributed operation across many machines; Clojure is designed for a > single machine with many cores.", how are Clojure and Haskell > different? I am just curious to know how do Haskell, Clojure and > Erlang compare. > > On Sep 24, 4:36 am, Lance Carlson <lancecarl...@gmail.com> wrote: > > > I'd recommend an architecture where you utilize ejabberd and create > > bots/components that read XML stanzas and react. That way you can just > > scale your application servers separately and use any language you > > choose. You also get chat for free. > > > On Thu, Sep 24, 2009 at 4:23 AM, ngocdaothanh <ngocdaoth...@gmail.com> > > wrote: > > > > I think there are 2 kinds of concurrency: local concurrency (one > > > machine) and distributed concurrency (parallel). > > > > Is there a comparison about the speed of local concurrency of Clojure > > > and Erlang? > > > > I would like to create an online multiplayer game server which serves > > > thousands of persistent flash connections. On a single machine > > > (something like Intel i7 with 6GB RAM), can JBoss Netty + Clojure beat > > > gen_tcp + Erlang? > > > > Thanks. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~----------~----~----~----~------~----~------~--~---
