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I had the pleasure to give a new talk today, on design in functional programming — types, abstractions and monads — using the motivating example of scripting. The slides are below and a PDF version is available. Shell scripts are often a quick, dirty way to get the job done. You glue together external tools, maybe do a little error checking and process all data as strings. This is great for some

In this post we’ll play with GHC’s new LLVM code generator backend, and see how much faster some Haskell programs are when compiled with LLVM instead of GCC. For the kind of loops we get from stream fusion, the -fllvm backend produced a lot better code, up to 3x faster in some cases. There are pretty graphs, and some smoking hot new technology. Overview This week David Terei announced that his wor

I’m busy preparing a tutorial for DEFUN on Saturday, and was putting together the “further reading” slides for the attendees, so they have material to go to for deeper reading. Here’s my basic “How to learn about parallel programming in Haskell” reading list. Learn Parallel Haskell “Real World Haskell”, O’Sullivan, Goerzon, Stewart. O’Reilly 2008. Ch. 24, 25, 28. Step by step guide to implicit and