Nov 17 2008

Clojure DSP Longing

I often find myself longing to be able to use Clojure, a very enticing lispy language that runs on the JVM.

I could possibly be using it right now in my dissertation research. It has the promise of dynamic languages, functional programming, almost-as-cool-as-Erlang concurrency, JVM performance, and Java library soup. It could be so awesome. A few months ago I started briefly down this road, unaware that…

Clojure sucks. Not generally, but it sucks for DSP. More specifically, Java and therefore Clojure has no real support for complex numbers. In order to do serious DSP, you need native syntactic, semantic, and performance support for complex numbers. Java has none of the above. Older versions of C didn’t have syntactic or semantic support, but the performance of using arrays was plenty fast. Not so in Java, at least not to the extent necessary to override the lack of syntactic and semantic.

So someday, when I’m writing general purpose code again and not high performance DSP code, I will have an opportunity to use Clojure, and I think that will make me very happy. By then the book will be out of beta. The community will be in full swing. There will be awesome libraries. Children will play in pristine parks with formerly-ravenous ravens.

In the meantime, if anyone sees the scene change, do let me know.