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cloudflare/workerd

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The JavaScript / Wasm runtime that powers Cloudflare Workers

55 mentions on Hacker News by 30 people: 2 stories, 53 comments · first 2022-09-27 · latest 2026-09-23

Mentions per year 55 mentions · busiest year 2026 (19)
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  1. …good argument (but most recommendations I see for iteration count are <1M). Constant defined here: https://github.com/cloudflare/workerd/blob/main/src/workerd/...
    comment by kentonv · 2026-09-23 · in PBKDF2 has a 100k-iteration ceiling in Cloudflare Workers
  2. …Workers Runtime is open source, so you could deploy it or your own machines, too, if you want: https://github.com/cloudflare/workerd
    comment by kentonv · 2026-08-14 · in Self-hosted web push Cloudflare Worker, works on iOS
  3. …here that is operationally easy to set up. (Basically: just connect all the nodes to NFSv4.) [0] https://github.com/cloudflare/workerd/pull/6780
    comment by kentonv · 2026-08-06 · in Cloudflare OS: an open platform for agents, apps, and work
  4. You beat us to it! Been meaning to land this but got distracted. https://github.com/cloudflare/workerd/pull/6780 But honestly I love that there are multiple implementations now.
    comment by kentonv · 2026-08-05 · in Celld: Self-hosted, distributed Durable Objects
  5. what is the difference between celld and Cloudflare Workers open source version workerd? https://github.com/cloudflare/workerd
    comment by jitl · 2026-08-05 · in Celld: Self-hosted, distributed Durable Objects
  6. …sourced [1]. I tried deploying it and had Deepseek v4 Flash create a dumb whiteboarding app. [1] https://github.com/cloudflare/workerd
    comment by orakmoya · 2026-08-05 · in Cloudflare OS: an open platform for agents, apps, and work
  7. …no big deal, but a company-wide instance might not work well. But I'm actually fixing that: https://github.com/cloudflare/workerd/pull/6780 Unfortunately didn't get enough time to land it before this release, but it'll come soon. With that…
    comment by kentonv · 2026-08-05 · in Cloudflare OS: an open platform for agents, apps, and work
  8. …https://github.com/cloudflare/cloudflare-os It runs on top of our open source runtime. https://github.com/cloudflare/workerd
    comment by kentonv · 2026-08-05 · in Cloudflare OS: an open platform for agents, apps, and work
  9. …https://github.com/cloudflare/cloudflare-os It runs on the open source Workers Runtime: https://github.com/cloudflare/workerd You can run it at home if you want. There's even a Home Assistant Gatekeeper.
    comment by kentonv · 2026-08-05 · in Cloudflare OS: an open platform for agents, apps, and work
  10. …[1] https://developers.cloudflare.com/workers/runtime-apis/conte... [2] https://github.com/cloudflare/workerd/blob/main/src/workerd/... [3] https://github.com/cloudflare/workerd/blob/main/src/workerd/...
    comment by kentonv · 2026-07-06 · in Workers Cache
  11. Yes, the Cloudflare Workers Runtime is open source: https://github.com/cloudflare/workerd You can definitely run workerd in production on your own machines and some people do. The biggest catch is that workerd's implementation of Durable…
    comment by kentonv · 2026-06-07 · in Show HN: Kyushu – A self-hostable WASM sandbox for JavaScript workers
  12. Workers runtime is open source and permissively licensed fwiw https://github.com/cloudflare/workerd
    comment by switz · 2026-04-16 · in Cloudflare's AI Platform: an inference layer designed for agents
  13. …Desktop Portal: https://wiki.archlinux.org/title/Bubblewrap#Using_portals > cloudflared/workerd: https://github.com/cloudflare/workerd : >> WARNING: workerd is not a hardened sandbox wasmtime-mte requires support for ARM64 Memory Tagging…
    comment by westurner · 2026-02-19 · in Show HN: CSL-Core – Formally Verified Neuro-Symbolic Safety Engine for AI
  14. …Cloudflare Runners also run WASM; with workerd: cloudflare/workerd : https://github.com/cloudflare/workerd ... "Cage" implements ARM64 MTE Memory Tagging Extensions support for WASM with LLVM emscripten iirc: - "Cage: Hardware-
    comment by westurner · 2026-01-30 · in Show HN: Amla Sandbox – WASM bash shell sandbox for AI agents
  15. …come with a big warning NOT to use it as a sandbox for untrusted code - here's the workerd one https://github.com/cloudflare/workerd?tab=readme-ov-file#war... and here's the PyMiniRacer section: https://bpcreech.com/PyMiniRacer/architecture…
    comment by simonw · 2026-01-04 · in JavaScript engines zoo – Compare every JavaScript engine
  16. There is a big "WARNING: This is a beta. Work in progress" message in https://github.com/cloudflare/workerd Specifically, half of the services operate locally, and the other half require CF services. I mainly use Claude Code to develop,…
    comment by buremba · 2026-01-04 · in Show HN: OpenWorkers – Self-hosted Cloudflare workers in Rust
  17. …: Classic, even Cloudflare workerd has "WARNING: workerd is not a hardened sandbox" in the README! https://github.com/cloudflare/workerd?tab=readme-ov-file#war...
    comment by simonw · 2026-01-04 · in JavaScript engines zoo – Compare every JavaScript engine
  18. Probably worth pointing out that the Cloudflare Workers runtime is already open source: https://github.com/cloudflare/workerd
    comment by rozenmd · 2026-01-01 · in Show HN: OpenWorkers – Self-hosted Cloudflare workers in Rust
  19. Cool project, great work! Forgive the uninformed questions, but given that `workerd` ( https://github.com/cloudflare/workerd ) is "open-source" (in terms of the runtime itself, less so the deployment model), is the main distinction here…
    comment by tbrockman · 2026-01-01 · in Show HN: OpenWorkers – Self-hosted Cloudflare workers in Rust
  20. …conflicts and no worry about blocking other queries. Extensions are easy to enable, file a bug on https://github.com/cloudflare/workerd . (Though this one might be trickier than most as we might have to do some build engineering.)
    comment by kentonv · 2025-12-11 · in Python Workers redux: fast cold starts, packages, and a uv-first workflow
  21. …CloudFlare", but for true compat you can probably also self host workerd itself which is open source: github.com/cloudflare/workerd
    comment by som · 2025-12-05 · in Show HN: Pbnj – A minimal, self-hosted pastebin you can deploy in 60 seconds
  22. …is only a part of the Cloudflare Workers stack. It doesn't have the same security properties. https://github.com/cloudflare/workerd#warning-workerd-is-not... (I know you know this, but frankly you should add a disclaimer when you comment…
    comment by yencabulator · 2025-11-21 · in Head in the Zed Cloud
  23. …source version of their Workers runtime[0], so the lock-in isn't as strong as it once was. [0]: https://github.com/cloudflare/workerd
    comment by hobofan · 2025-11-11 · in Head in the Zed Cloud
  24. The Cloudflare Workers runtime is open source: https://github.com/cloudflare/workerd People can and do use this to run Workers on hosting providers other than Cloudflare.
    comment by kentonv · 2025-11-10 · in Head in the Zed Cloud
  25. …workerd is a tailor-made runtime (equivalent level to deno/node/bun/etc.) it uses the V8 engine. https://github.com/cloudflare/workerd/blob/main/docs/v8-upda...
    comment by laurencerowe · 2025-07-27 · in The many JavaScript runtimes of the last decade
  26. …with node? Cloudflare Workers workerd comes to mind but it's fundamentally a different thing. https://github.com/cloudflare/workerd It's not meant to be a generalist backend runtime and it provides almost zero batteries.
    comment by pier25 · 2025-05-20 · in Reports of Deno's Demise Have Been Greatly Exaggerated
  27. https://github.com/cloudflare/workerd
    comment by ameliaquining · 2025-05-11 · in Why not object capability languages?
  28. …has a strong tradition of open source, even for core parts of their product, like workerd ( https://github.com/cloudflare/workerd ), and also maintains a bunch of key infrastructural libraries like quiche. They aim to compete with their…
    comment by necubi · 2025-04-10 · in Arroyo (YC W23) has been acquired by Cloudflare
  29. …some). I assume you are referring to V8 here but that also powers Deno. WorkerD is open source: https://github.com/cloudflare/workerd I personally am not a fan of Deno because of how it split the Node JS ecosystem, so that is not a benefit…
    comment by sgammon · 2024-11-08 · in Edge Scripting: Build and run applications at the edge
  30. …and Workers locally over the years. Eg: https://github.com/cloudflare/workers-sdk/issues/2964 https://github.com/cloudflare/workerd/issues/1897
    comment by pier25 · 2024-09-28 · in Our container platform is in production. It has GPUs. Here's an early look
  31. …an app on DO but decide you don't want to host it on Cloudflare, you can self-host it on workerd: https://github.com/cloudflare/workerd
    comment by kentonv · 2024-04-05 · in Cloudflare acquires PartyKit to allow developers to build real-time multi-user
  32. …look forward all the cool apps that people will now build with this! [1] https://pyodide.org/ [2] https://github.com/cloudflare/workerd/blob/main/docs/pyodide... [3] https://github.com/cloudflare/workerd/pull/1875 Edit: updated wording…
    comment by syrusakbary · 2024-04-02 · in Python Cloudflare Workers
  33. Would love feedback on which packages you'd like to see us support: https://github.com/cloudflare/workerd/discussions/categories...
    comment by brendanib · 2024-04-02 · in Python Cloudflare Workers
  34. For ref: - https://blog.cloudflare.com/workerd-open-source-workers-runt... - https://github.com/cloudflare/workerd
    comment by grav · 2024-02-10 · in LLRT: A low-latency JavaScript runtime from AWS
  35. …just to use this via their hosted edge platform. But then I wonder why I wouldn't just use https://github.com/cloudflare/workerd which is also open source. Surely that is fast enough? If not then it should show some benchmarks? I suppose…
    comment by Nathanba · 2023-10-28 · in WinterJS
  36. i love how the main reference for workerd can be just one capnp file. https://github.com/cloudflare/workerd/blob/main/src/workerd/... this changed my world how i think about computing on the web. if there was just a good enough js library…
    comment by jFriedensreich · 2023-07-28 · in Cap'n Proto 1.0
  37. …Workers is C++. I would assume that a lot of the related things (KV, Durable Objects, etc) too. https://github.com/cloudflare/workerd
    comment by yencabulator · 2023-07-21 · in A Decade of Rust, and Announcing Ferrocene
  38. The equivalent here to kubernetes is workerd, it's open source https://github.com/cloudflare/workerd/ The platform that VPSes kubernetes uses run on though, all the big clouds have a proprietary one.
    comment by gpm · 2023-05-29 · in Connect() – a new API for creating TCP sockets from Cloudflare Workers
  39. A significant chunk of it is open source: https://github.com/cloudflare/workerd/
    comment by dom96 · 2023-05-29 · in Connect() – a new API for creating TCP sockets from Cloudflare Workers
  40. …been a pet desire of mine, and this could drastically slash the effort required to experiment. https://github.com/cloudflare/workerd It's awesome to see thr container model maturing. Much better runtime behavior here. And the ability to…
    comment by rektide · 2023-05-12 · in Huawei Open Sources Kuasar, a Rust-Based Container Runtime
  41. …of helping the competition. Example: we open sourced the entire runtime for Cloudflare Workers! https://github.com/cloudflare/workerd Open sourcing something has a cost and we mostly only open source things like stand-alone libraries. We…
    comment by jgrahamc · 2023-03-10 · in Oxy is Cloudflare's Rust-based next generation proxy framework
  42. …I'm having trouble triggering this in an observable way without writing a custom HTTP client. https://github.com/cloudflare/workerd/blob/5d644d0189246a22e... https://github.com/cloudflare/workerd/blob/5d644d0189246a22e... I also don't see…
    comment by yencabulator · 2023-03-02 · in “The script will never generate a response” on Cloudflare Workers
  43. Even the Worker runtime is open-source now: https://github.com/cloudflare/workerd
    comment by rozenmd · 2023-02-15 · in Ask HN: What's a good open-source alternative to Cloudflare?
  44. …much of the old stack build on nginx is gradually being migrated to Workers. https://workers.dev https://github.com/cloudflare/workerd In another part of the stack, there is Pingora, another built-from-scratch web server focused on…
    comment by kentonv · 2023-02-08 · in What is a CDN? How do CDNs work?
  45. You can self host the entire Worker runtime if you'd like: https://github.com/cloudflare/workerd
    comment by rozenmd · 2022-10-23 · in Cloudflare Pages: Best server tech since CGI-bin?
  46. The engine is open source: https://github.com/cloudflare/workerd We did not create our own engine to create "lock-in". On the contrary, it would be a huge win for us if we could simply run FastCGI or Node or whatever applications…
    comment by kentonv · 2022-10-23 · in Cloudflare Pages: Best server tech since CGI-bin?
  47. …[2] https://developers.cloudflare.com/pages/platform/functions#d... [3] https://wintercg.org/ [4] https://github.com/cloudflare/workerd
    comment by ameliaquining · 2022-10-23 · in Cloudflare Pages: Best server tech since CGI-bin?
  48. For Cloudflare Workers, it's no longer a joke either: https://github.com/cloudflare/workerd
    comment by methyl · 2022-10-17 · in How to build software like an SRE
  49. …to compile workerd [2] to wasm instead. [1] https://github.com/johnhenry/actually-serverless [2] https://github.com/cloudflare/workerd
    comment by johnhenry · 2022-10-04 · in Postgres WASM
  50. …squash history on the first commit for a bunch of reasons, but there are 55 co-authors listed. :) https://github.com/cloudflare/workerd/commit/a265d5c22bf2a6b...
    comment by kentonv · 2022-09-27 · in Workerd: Open-source Cloudflare workers runtime