RUBY MIGHT BE FASTER THAN YOU THINK

Summary from the TLDR newsletter

The crystalruby project allows writing and running Crystal methods inline inside a Ruby file, bringing significant performance improvements to code compared to their pure Ruby versions. However, the Ruby implementation the project uses contains a subtle mistake that causes significantly more work than it needs to. Fixing this mistake makes the Ruby code run faster than the 'crystalized' method. Future advancements in the Ruby JIT may make these small tweaks unnecessary.