Which warts, exactly? It’s a happy account of simple code changes that led to dramatic speed improvements, found using GHC’s great profiler. I’m excited about R

Which warts, exactly? It’s a happy account of simple code changes that led to dramatic speed improvements, found using GHC’s great profiler. I’m excited about Rust as well (and working on a similar language) but GHC’s performance is quite competitive. And I don’t find a few strictness annotations and MVars so onerous; in fact, I usually make my data structures strict by default, making fields lazy when I actually need knot-tying or streaming or what have you. This is also a good example of how easy concurrency and parallelism are in Haskell—I didn’t really get how to effectively program with concurrency until I learned Haskell, then ported the knowledge to more challenging environments in imperative-land.