> it looks extremely suspicious It matches my anecdotal experiences with graal. It's a huge complex machine with a lot of surface area for weird performance bu

> it looks extremely suspicious It matches my anecdotal experiences with graal. It's a huge complex machine with a lot of surface area for weird performance bugs. > TruffleRuby beats cruby on the same benchmark by 4.38x That benchmark only looks at peak performance, which TR unarguably dominates at, and ignores other important considerations like warmup time. Here's another railsbench (https://i.imgur.com/IzMRKdQ.png https://i.imgur.com/IzMRKdQ.png) from the same paper (https://dl.acm.org/doi/pdf/10.1145/3617651.3622982 https://dl.acm.org/doi/pdf/10.1145/3617651.3622982). TR achieves the best peak performance, but only after 3 minutes of warmup and it starts out 17x slower than cruby. If every time you deploy new code your latency spikes by 17x for 3 minutes, that's gonna be painful. I don't know of anyone that is using TR in production. Shopify were doing some work on it for a while, but they've since developed and shipped yjit so I don't know if they still have any investment in TR.