{"slug": "jco", "name": "jco", "category": "other", "category_name": "Other software", "description": "", "recommenders": 3, "commenters": 3, "warners": 0, "score": 2.603, "rising": -0.98, "first": "2026-01-04", "latest": "2026-06-10", "why": "With regards to the JS ecosystem specifically there are 3 projects to know:", "why_is_quote": true, "has_verdict": false, "sentiment": {"recommend": 3, "neutral": 0, "compare": 0, "warn": 0}, "spark": [0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0], "listed": true, "loved": [], "caveat": "", "short_quote": "With regards to the JS ecosystem specifically there are 3 projects to know:", "kind": "", "icon": true, "domain": null, "github_repo": "github.com/bytecodealliance/jco", "official_url": "https://github.com/bytecodealliance/jco", "pricing": "", "aliases": ["jco", "JCO"], "verdict": null, "praise": [{"label": "", "summary": "", "quotes": [{"id": 775782768, "item_id": 48486423, "url": "https://news.ycombinator.com/item?id=48486423", "by": "enos_feedler", "date": "2026-06-10", "version": null, "stance": "recommend", "quote": "It works in the browser already", "excerpt": "It works in the browser already: https://github.com/bytecodealliance/jco", "context": "", "use_case": "", "switched_from": "", "story": "The Road to the WASM Component Model 1.0"}, {"id": 757495218, "item_id": 47343451, "url": "https://news.ycombinator.com/item?id=47343451", "by": "hardwaresofton", "date": "2026-03-11", "version": null, "stance": "recommend", "quote": "With regards to the JS ecosystem specifically there are 3 projects to know:", "excerpt": "If you\u2019d like to get acquainted with modern WebAssembly, check out the component model book: https://component-model.bytecodealliance.org/ It includes high level concepts, practical code samples and more that introduce the really powerful parts of WebAssembly. With regards to the JS ecosystem specifically there are 3 projects to know: https://github.com/bytecodealliance/StarlingMonkey https://github.com/bytecodeallia", "context": "", "use_case": "JS on WebAssembly", "switched_from": "", "story": "Making WebAssembly a first-class language on the Web"}, {"id": 743896576, "item_id": 46493536, "url": "https://news.ycombinator.com/item?id=46493536", "by": "laurencerowe", "date": "2026-01-04", "version": null, "stance": "recommend", "quote": "There's also JCO for creating JS based WebAssembly components", "excerpt": "There's also JCO for creating JS based WebAssembly components. It's based on StarlingMonkey which I believe is slightly faster than QuickJS under web assembly. https://github.com/bytecodealliance/jco Benchmark numbers for request isolated JS hello world / React page rendering: JCO/wasmtime: 314\u00b5s / 13ms Bun process forking: 1.7ms / 8.2ms v8 isolate from snapshot: 0.7ms / 22ms TinyKVM: 52\u00b5s / 708\u00b5s Native with reuse 1", "context": "", "use_case": "", "switched_from": "", "story": "JavaScript engines zoo \u2013 Compare every JavaScript engine"}]}], "caveats": [], "who": [], "tags": [], "use_cases": ["js on webassembly"], "compared": [], "makers": [], "threads": [{"url": "https://news.ycombinator.com/item?id=48448083", "title": "The Road to the WASM Component Model 1.0", "mentions": 1}, {"url": "https://news.ycombinator.com/item?id=47331811", "title": "Making WebAssembly a first-class language on the Web", "mentions": 1}, {"url": "https://news.ycombinator.com/item?id=46486978", "title": "JavaScript engines zoo \u2013 Compare every JavaScript engine", "mentions": 1}], "sentiment_by_month": {"2025-11": {}, "2025-12": {}, "2026-01": {"recommend": 1}, "2026-02": {}, "2026-03": {"recommend": 1}, "2026-04": {}, "2026-05": {}, "2026-06": {"recommend": 1}, "2026-07": {}, "2026-08": {}, "2026-09": {}, "2026-10": {}}, "versions": [], "version_unnamed": 0, "family_ref": null, "runs_on": null, "lines": [], "quotes": [{"id": 775782768, "item_id": 48486423, "url": "https://news.ycombinator.com/item?id=48486423", "by": "enos_feedler", "date": "2026-06-10", "version": null, "stance": "recommend", "quote": "It works in the browser already", "excerpt": "It works in the browser already: https://github.com/bytecodealliance/jco", "context": "", "use_case": "", "switched_from": "", "story": "The Road to the WASM Component Model 1.0"}, {"id": 757495218, "item_id": 47343451, "url": "https://news.ycombinator.com/item?id=47343451", "by": "hardwaresofton", "date": "2026-03-11", "version": null, "stance": "recommend", "quote": "With regards to the JS ecosystem specifically there are 3 projects to know:", "excerpt": "If you\u2019d like to get acquainted with modern WebAssembly, check out the component model book: https://component-model.bytecodealliance.org/ It includes high level concepts, practical code samples and more that introduce the really powerful parts of WebAssembly. With regards to the JS ecosystem specifically there are 3 projects to know: https://github.com/bytecodealliance/StarlingMonkey https://github.com/bytecodeallia", "context": "", "use_case": "JS on WebAssembly", "switched_from": "", "story": "Making WebAssembly a first-class language on the Web"}, {"id": 743896576, "item_id": 46493536, "url": "https://news.ycombinator.com/item?id=46493536", "by": "laurencerowe", "date": "2026-01-04", "version": null, "stance": "recommend", "quote": "There's also JCO for creating JS based WebAssembly components", "excerpt": "There's also JCO for creating JS based WebAssembly components. It's based on StarlingMonkey which I believe is slightly faster than QuickJS under web assembly. https://github.com/bytecodealliance/jco Benchmark numbers for request isolated JS hello world / React page rendering: JCO/wasmtime: 314\u00b5s / 13ms Bun process forking: 1.7ms / 8.2ms v8 isolate from snapshot: 0.7ms / 22ms TinyKVM: 52\u00b5s / 708\u00b5s Native with reuse 1", "context": "", "use_case": "", "switched_from": "", "story": "JavaScript engines zoo \u2013 Compare every JavaScript engine"}]}