Neil Mitchell's Blog (Haskell etc)

Summary: How to compile GHC on Windows using Stack and the new Shake-based GHC build system. Regularly updated instructions are at https://g...

Summary: A Haskell sales pitch without any code. I often find myself in a pub, without pen or paper, trying to persuade someone to try Haske...

Summary: In the new version of HLint, errors are warnings and warnings are suggestions. I plan to remove the old API very soon. I've jus...

I've been a fan of the idea of meal replacement products for a while - the Matrix gruel always seemed simple and appealing. One such p...

Summary: An example of a small function I recently wrote - from type signature to tests. When writing a build system there are lots of nast...

The GCHQ 2015 Christmas puzzle is a Nonogram puzzle, which involves filling in squares on a grid to reveal a picture, guided by constraint...

Summary: The MinGHC project has now finished. The MinGHC project was started to produce a minimal Windows installer which didn't contai...

Summary: Stackage LTS is mostly pointless. Stackage provides a set of precise versions of a subset of Hackage which all place nicely toget...

Summary: One of HLint's rules reduced sharing in the presence of view patterns. Lambda desugaring and optimisation could be improved in ...

Summary: When thinking about the filepath .. , remember symlinks, or you will trip yourself up. As the maintainer of the Haskell filepath pa...

Summary: The video of my recent Shake talk is now online. My Haskell eXchange 2015 talk "Defining your own build system with Shake...

Summary: Using the technique from the previous post , here are three space leaks I found. Every large Haskell program almost inevitably cont...

Summary: Below is a technique for easily detecting space leaks. It's even found a space leak in the base library. Every large Haskell pr...

Summary: We have a version of mapM for IO that takes O(1) stack and is faster than the standard Haskell/GHC one for long lists. The stand...

Summary: Testing shows the presence, not the absence of bugs. Recently, someone suggested to me that, thanks to test suites, things like cha...

I'll be talking at the Cambridge NonDysFunctional Programmers Meetup this coming Thursday (13 Aug 2015). Doors open at 7:00pm with talk...

Summary: I wrote a Conduit combinator which makes the upstream and downstream run in parallel. It makes Hoogle database generation faster. T...

Summary: I'm growing increasingly fond of the Conduit library. Here I give my intuitions and some hints I'd have found useful. Recen...

Summary: I wrote an extra library, which contains lots of my commonly used functions. When starting to write Bake , my first step was to co...

Summary: Writing a fast continuous integration server is tricky. When I started writing the continuous integration server Bake , I thought I...