> 2x slower than Python Several multi-core Ruby programs failed when run with 3.0.0-preview1 --jit Which is why you see Python3 programs using 4 cores for spe

> 2x slower than Python Several multi-core Ruby programs failed when run with 3.0.0-preview1 --jit Which is why you see Python3 programs using 4 cores for spectral-norm and binary-trees and fannkuch-redux — when the corresponding Ruby program is only using one core. https://benchmarksgame-team.pages.debian.net/benchmarksgame/measurements/yarv.html https://benchmarksgame-team.pages.debian.net/benchmarksgame/... It’s multi-core age today. Concurrency is very important. With Ractor, along with Async Fiber, Ruby will be a real concurrent language. — Matz We need new Ruby programs for the benchmarks game, to show that new concurrent language.