Ruby 4.1's first preview is here

#​821 — October 15, 2026 Read on the Web Ruby Weekly Ruby 4.1 Preview 1 Released — Two months out from its final release, we get a 4.1 preview to play with, complete with Module#descendants , Ractor-local GC, YJIT on Windows, and a raft of smaller changes. Worth testing to shake out the effects of things like Symbol#to_s returning frozen strings and all Regexp instances being frozen too. Yui Naruse Your Rails App Doesn’t Need a Data Warehouse — Slow Rails reports usually get a warehouse ...