Rob Palmer
@robpalmer2
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JavaScript Infrastructure & Tooling at Bloomberg. Co-chairing @TC39. Likely to tweet tech stuff about JS & software performance. Opinions are my own.
London, England
Joined July 2009
RT @rspack_dev: A new RFC for Rspack's barrel file optimization. Take a look 👀.
github.com
Summary Lazily build reexports in side-effect-free barrel files to minimize performance overhead from excessive module inclusion, avoiding unnecessary resolve and build processes for these modules....
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RT @astuyve: v8 just dropped a 2x perf improvement on JSON.stringify using time tested performance techniques. - SIMD/SWAR to find escape c….
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ECMAScipt enlightenment 😉. 🔊 A wonderful podcast about @TC39, JavaScript, TypeScript & @TechAtBloomberg featuring my coworker Daniel Ehrenberg & @niklas_wortmann (47 mins). Dan talks about how the committee works, who participates, why Bloomberg participates, & much more.
🎙️ NEW EPISODE: Ever wonder who decides what goes into JavaScript?.I talked with Daniel Ehrenberg (President of Ecma International & TC39 veteran) about how JS actually evolves. The inside story of syntax debates, consensus building & what's coming next 🔥. Links below 👇.
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RT @satanacchio: There are 4.2k occurences of `--experimental-strip-types` on github.Time to remove it folks 😜.
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TypeScript excitement 😉. TS 5.9 is out 🎉. 🔶 `import defer` by @NicoloRibaudo.🔶 module: "node20" for require(ESM).🔷 --init has modern defaults (no downlevel).🔷 Docs: Inline summaries for DOM APIs.🔷 IDE: Expandable hovers for Quick Infos.🔷 Perf: Faster type instantiation.
TypeScript 5.9 is now available! 📣. This release brings:. ✅ An updated tsc --init.✅ Type-checking for the new 'import defer'.✅ Actual summaries in more DOM APIs.✅ Expandable quick info hovers (✨preview✨). and more! Read up more on our blog:.
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RT @_pi0_: Did you know that Node.js* supports:. ✅ ESM and TypeScript.✅ Watch mode.✅ Web Standard APIs.✅ Arg parser.✅ .env files. Now put t….
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RT @rspack_dev: Rspack v1.5 will introduce an experimental optimization that skips building unused reexports in side-effect-free barrel fil….
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RT @slagiewka: @satanacchio Congrats! We started running type stripping on a canary earlier this week and yesterday it got normalised w/o i….
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Node excitement 😉. Congrats to @satanacchio on today's landmark Node 22.18 release. It is the first LTS release to ship unflagged TypeScript support 🎉. This means Node can run *.ts files. It pairs well with TypeScript's "erasableSyntaxOnly" flag 👍. Many folk contributed 🙏.
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Node excitement 😉. This is the first ever Node LTS release to have TypeScript support available by default 🎉🎉🎉. No opt-in flag. No warning message. It just works. @satanacchio is the MVP on this one. He worked for a year to get this done, building consensus & shipping code.
Node.js v22.18.0 is out 🎉.Type stripping is enabled by default 🔥🔥🔥🔥.You can just run `node file.ts` without `--experimental-strip-types` flag.
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Notes will be published in two weeks time. The full agenda is here:.
github.com
TC39 meeting agendas. Contribute to tc39/agendas development by creating an account on GitHub.
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ECMAScript excitement 😉. TC39 advanced:. 4️⃣ Math.sumPrecise.4️⃣ Uint8Array ↔️ base64/hex.3️⃣ Iterator Sequencing.3️⃣ Upsert.3️⃣ Immutable ArrayBuffer.2️⃣.7️⃣ Intl Era/Month Code.2️⃣ Import Bytes.1️⃣ Module Global.1️⃣ Array.getNonIndexStringProperties.1️⃣ Object.getOwnPropertySymbols opts.
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ECMAScript excitement 😉. Congrats to Richard Gibson on conditionally advancing Immutable ArrayBuffers to Stage 3 at TC39 this week 🎉. ArrayBuffer.prototype. get immutable(). transferToImmutable(newLength). sliceToImmutable(start, end). The data cannot change 🔒.
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ECMAScript excitement 😉. Congrats to @smooshMap on advancing the Iterator Sequencing proposal to Stage 3 at TC39 this week 🎉. let it = Iterator.concat(it1, it2, . ). It helps you create an iterator by stitching together a sequence of iterators 👍
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The repo is here:.
github.com
TC39 proposal to add a summation method to JavaScript - tc39/proposal-math-sum
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ECMAScript excitement 😉. Congrats to @bakkoting on advancing Math.sumPrecise to Stage 4 at TC39 this week 🎉. let vals = [1e20, 0.1, -1e20];. Math.sumPrecise(vals); //👉 0.1. It lets you calculate the sum of an array of numbers. Manual addition in a loop can lose precision.
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