New blog post series on how I made an interpreter written in #Haskell 700× faster
http://www.joachim-breitner.de/blog/758-Winter_is_coming_even_more_quickly …
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Third in the series: Difference lists give you O(1) concatenation, and every Haskell programmer should know about them. And they can even fix memory leaks (although I am not entirely sure why). https://www.joachim-breitner.de/blog/761-Faster_Winter_3__Difference_Lists …
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The forth entry is a small one: Export lists help improving performance: http://www.joachim-breitner.de/blog/762-Faster_Winter_3__Export_lists …
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In the fifth entry, I talk about how ReaderT gets in the way, and why eta-expansion is so important for performance: http://www.joachim-breitner.de/blog/763-Faster_Winter_5__Eta-Expanding_ReaderT …
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Time for the sixth entry, a small one showing that sometimes, simpler code is better code: http://www.joachim-breitner.de/blog/764-Faster_Winter_6__Simpler_Code …
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After a week, I can publish the seventh and (for now) last entry, where we introduce a “control stack” (or should I say, “zipper-like data structure”)? http://www.joachim-breitner.de/blog/765-Faster_Winter_7__The_Zipper … I am also sharing the code used for the benchmarks, stats and the graph: http://www.joachim-breitner.de/blog/766-Faster_Winter__Statistics_the_making-of …
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