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Bryan O'Sullivan's blog
Blog Archives
(re)announcing statprof, a statistical profiler for Python
Back in 2005, Andy Wingo wrote a neat little statistical profiler named statprof that promptly disappeared into obscurity. It has since languished almost unknown, with a handful of people writing semi-private forks that themselves seem to be dead. Statistical profiling…
Posted in open source, python
aeson 0.4: easier, faster, better
After months of work, and a number of great contributions from other developers, I just released version 0.4 of aeson, the de facto standard Haskell JSON library. This is a major release, with a number of improvements. Enjoy! Ease of…
Posted in haskell, open source
The future of MailRank’s open source technologies
(Cross-posted from the MailRank engineering blog.) You may have seen my exciting news about our upcoming move to Facebook. It’s been a total blast working on our product, and of course as we did so we released a number of…
Posted in haskell, open source
A major new release of the Haskell statistics library
I'm pleased to announce a major release of of the Haskell statistics library, version 0.10.0.0. I'd particularly like to thank Alexey Khudyakov for his wonderful work on this release. New features: Student-T, Fisher-Snedecor, F-distribution, and Cauchy-Lorentz distributions are added. Histogram…
Posted in haskell, open source
The Strange Loop conference was a blast
Last week, I flew to St Louis for the excellent Strange Loop conference, where I gave a 3-hour Haskell tutorial and a talk on how we use Haskell at my startup company, MailRank. Strange Loop is a pretty good approximation…
Posted in haskell, open source
Fitter, happier, more productive UTF-8 decoding
The other night, I had a random whim to spend a couple of minutes looking at the performance of UTF-8 decoding in the Haskell Unicode text package. Actually, rather than look at the actual performance, what I did was use…
Posted in haskell, open source
Here be dragons: advances in problems you didn’t even know you had
Here’s something I bet you never think about, and for good reason: how are floating-point numbers rendered as text strings? This is a surprisingly tough problem, but it’s been regarded as essentially solved since about 1990.Prior to Steele and White’s…
A new week, a new JSON performance improvement
It’s been a few weeks since I last wrote about the aeson library for working with JSON in Haskell, but this isn’t because I’ve been idle. In fact, just tonight I put out a new release. Where the previous releases…
Posted in haskell, open source
A little care and feeding can go a long way
Sometimes, when a software package meets a certain level of maturity (or the desire to hack on it fades sufficiently), it's tempting to consider it "done". Here's a little tale of when done isn't really done.About a week ago, I…
Posted in haskell, open source
Faster, better, cleaner: new aeson and attoparsec releases
I’ve spent some time over the past few weeks improving the performance of the attoparsec parsing library, and of the aeson JSON library. Since they’ve now reached a new plateau of performance and stability, I thought this would be a…
Posted in haskell, open source
