Hunting JavaScript memory leaks with V8 mechanics and Chrome DevTools
How V8 decides what stays alive, seven common leak patterns, and how to find the retaining path with Performance and heap snapshots.
Stuzhuk Lab — Chemistry of Code
Chemistry of Code
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javascript
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Svelte 5 runes: explicit reactivity instead of magic
Svelte 5 replaced implicit UI updates with runes. What that did to bundle size, and what the old promise cost.
Seven vulnerability patterns in AI-generated code — and how to catch them
Assistants optimize for a plausible runnable sample, not production. A Dev.to write-up names seven recurring holes and ships ai-vuln-scan to catch them.
Voodoo.js: breakthrough or a return to a simpler web?
A deep look at Voodoo.js: HTML-first without a build, JSX in markup, reactivity without a Virtual DOM, honest benchmarks, and why the idea matters more than speed in the AI-coding era.
Inside Voodoo.js: how a custom interpreter brings plain HTML to life
Reverse engineering Voodoo.js: from the browser HTML parser’s DOM to a lexer, Pratt AST, tree-walking interpreter, Proxy effects, and direct node writes—without eval.
Voodoo.js: a runtime architecture without a compiler, Virtual DOM, or eval
A layer map of Voodoo.js: walker, scope, reactivity, the cost of skipping a build, bundle size, feature creep, and HTML as an artifact for AI coding.
Voodoo.js: reactivity and map/filter inside plain HTML
An HTML-first JS framework with one script tag—no bundler—reactive markup and JSX-style syntax in a normal page.
How Turbopack chunks your JavaScript in Next.js
Single bundle vs many requests, chunk groups, and Next.js 16.3 experiments: smarter fetching, analytics-based merging, CJS tree-shaking, shared runtime.
Bun 1.4: Rust runtime, closer Node.js compatibility, less memory
+1,517 Node tests, up to 35% less memory, ~2× faster Linux startup—first stable release after the Zig→Rust rewrite.
JavaScript in the agent harness: when a script is cheaper than model reasoning
A sandboxed JS interpreter replaces some tool hops and LLM arithmetic. Notes from a Habr deep dive on LM Studio and LangChain.
React useLatest: fresh state in async callbacks without extra renders
useLatest from @reactuses/core: a layout-effect ref against stale closures after await, timers, and subscriptions.
TanStack Table v9: pay only for the table features you register
Stable v9 four years after v8: tree-shakable features, TanStack Store, up to 86% less memory on a million rows, and ten framework adapters.
Bun in Rust, TypeScript 7, and npm 12: JavaScript Tooling Shifts
Bun rebuilds on Rust, TypeScript 7 speeds up compilation, and an npm incident underscores the operational cost of dependencies.
TypeScript 7.0 RC: Go-based compiler and up to 10× speed
Microsoft shipped TypeScript 7.0 RC on a new Go foundation: 6.0 compatibility, parallel builds, @typescript/typescript6 side-by-side, and a rebuilt --watch.
Biome vs Oxlint in 2026: Replacing ESLint
Rust-powered linters run 50–100× faster than ESLint, but choosing Biome or Oxlint depends on custom plugins, type-checking, and whether you want one tool instead of ESLint plus Prettier.
TypeScript 6.0, Next.js 16.2, and Node.js debates on AI-written code
JavaScript Weekly #778: strict by default, types=[], TS 7.0 prep; faster Next.js 16.2; Node.js nine CVEs and pushback on AI commits.