Effect 4.0
On this page One ecosystem, zero dependencies From functions to clusters Mainstream adoption Long-term support What’s next Over to you Today, we’re releasing Effect 4.0. It’s the most ambitious release we’ve ever shipped. It’s faster, uses a fraction of the memory, and tree-shakes to far smaller bundles.
- ▪On this page One ecosystem, zero dependencies From functions to clusters Mainstream adoption Long-term support What’s next Over to you Today, we’re releasing Effect 4.0.
- ▪It’s the most ambitious release we’ve ever shipped.
- ▪It’s faster, uses a fraction of the memory, and tree-shakes to far smaller bundles.
Hacker News (Front Page) files mainly under programming. We currently carry 2,382 of its stories. Top-voted stories on Hacker News.
Story provenance
Source · retrieval · rights · ranking — open for full record
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Story provenance
Attribution is not the same as permission. This drawer separates discovery metadata, excerpts, WeSearch-generated summaries, reuse status, and whether the publisher receives the visit. Nothing here claims a legal grant the publisher has not made.
Record
| Original publisher | Effect |
| Canonical URL | https://effect.website/blog/releases/effect/40 |
| Publication time | Thu, 01 Oct 2026 19:10:07 +0000 |
| Retrieval time | 2026-10-01T21:57:54.858Z |
| Last seen | 2026-10-01T21:57:54.858Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | None |
| Cluster logic | Not yet clustered, or no peer story found in the clustering window. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
On this page One ecosystem, zero dependencies From functions to clusters Mainstream adoption Long-term support What’s next Over to you Today, we’re releasing Effect 4.0. It’s the most ambitious release we’ve ever shipped. We rebuilt Effect from the ground up. It’s faster, uses a fraction of the memory, and tree-shakes to far smaller bundles. Effect 3 vs. Effect 4 3.x 4.x Smaller bundle size 5× Concurrent task throughput 6.4× Less memory per fiber 86% Minimal program size lower is better 3.x 35.6 kB 4.x 7.1 kB Tasks per second higher is better 3.x 0.71M 4.x 4.57M Heap for 50,000 fibers lower is better 3.x 157.5 MB 4.x 21.8 MB Bundles are built from identical source, minified and gzipped. Runtime figures are medians of nine fresh-process runs.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Effect.
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