Diggin’ and Fetchin’ with TruffleRuby - Shopify

This post details an investigation into a performance issue found in TruffleRuby, an alternative Ruby implementation. The investigation began with refactoring a clever but complex Ruby hash access pattern, leading to the exploration of `Hash#fetch` and `Hash#dig`. The author then prototyped a new method, `dig_fetch`, combining the flexibility of `fetch` with the traversal of `dig`, first by monkey-patching and then by contributing to TruffleRuby itself. Benchmarking revealed a significant performance degradation in `dig` and the prototype `dig_fetch` at deeper nesting levels, suggesting recursion might be a bottleneck and prompting further investigation into iterative solutions and compiler optimizations within TruffleRuby.