
The Changelog: Software Development, Open Source
The Roc programming language (Interview)
Jun 11, 2025 · 1 hr 35 min · 92.3 MB
0:00-1:35:56
Streams straight from the publisher. PodNod never proxies or re-hosts episode audio.
Jerod chats with Richard Feldman about Roc – his fast, friendly, functional language inspired by Richard’s love of Elm. Roc takes many of Elm’s ideas beyond the frontend and introduces some great ideas of its own. Get ready to learn about static dispatch, platforms vs applications, opportunistic mutation, purity inference, and a whole lot more.
Changelog++ members save 6 minutes on this episode because they made the ads disappear. Join today!
Sponsors:
- Retool – Assemble your elite AI team, arm them with powerful custom tools, and watch them make your to-do list disappear. Start for free or book a demo at retool.com/agents
- Fly.io – The home of Changelog.com — Deploy your apps close to your users — global Anycast load-balancing, zero-configuration private networking, hardware isolation, and instant WireGuard VPN connections. Push-button deployments that scale to thousands of instances. Check out the speedrun to get started in minutes.
Featuring:
Show Notes:
Something missing or broken? PRs welcome!
Join the discussion
changelog.zulipchat.comChangelog++
changelog.comRetool
retool.comFly.io
fly.ioCheck out the speedrun
fly.ioGitHub
github.comX
x.comWebsite
jerodsanto.netGitHub
github.comLinkedIn
linkedin.comMastodon
changelog.socialX
x.comThe Roc Programming Language
roc-lang.orgRoc Zulip Chat
roc.zulipchat.comSoftware Unscripted
pod.linkElm
elm-lang.orgPRs welcome!
github.com
- 0:00This week on The Changelog
- 1:12Sponsor: Retool
- 3:11Start the show!
- 7:48Elm
- 13:25Evolution
- 17:22Static dispatch
- 24:50Not self-hosted
- 28:48General purpose
- 31:03Platforms and apps
- 35:20Implementing platforms
- 38:16Sponsor: Fly.io
- 41:01Roc vs Go speed
- 44:50Oportunistic mutation
- 47:58ARC PTSD
- 51:42Maybe no, Result yes
- 1:00:34Purity inference
- 1:04:49Purity overload
- 1:08:30Distribution
- 1:10:02Downsides
- 1:16:02Sharing code
- 1:19:12Versioning
- 1:22:18Roc and LLMs
- 1:24:33New lang optimism
- 1:29:14Best Roc experience
- 1:30:39Community
- 1:31:19Now or later
- 1:32:38Connecting
- 1:33:00Strange Loop!
- 1:33:44C'est la vie
- 1:34:10Closing thoughts