Technical publishing by Ken Chauhttps://crashtestdev.com/https://crashtestdev.com/posts/604ms-rebuilds-at-50000-modules/https://crashtestdev.com/posts/604ms-rebuilds-at-50000-modules/Traditional bundlers start from scratch every time. Cloudpack maintains the module graph continuously and treats every output as a query. The result: 604ms warm rebuilds at 50,000 modules.Thu, 28 May 2026 00:00:00 GMThttps://crashtestdev.com/posts/50-percent-less-bandwidth-per-deploy/https://crashtestdev.com/posts/50-percent-less-bandwidth-per-deploy/Every deploy, your users re-download the whole bundle because 1% of modules changed. Delta manifests cut that in half. The browser says what it has. The server returns only what's missing.Thu, 28 May 2026 00:00:00 GMThttps://crashtestdev.com/posts/50kb-down-to-2kb-why-we-stopped-parsing/https://crashtestdev.com/posts/50kb-down-to-2kb-why-we-stopped-parsing/A typical TypeScript source file is 50KB. Its module summary is 2KB. At 50,000 modules that's the difference between 2.5GB and 100MB. The 100MB fits in L3 cache. The 2.5GB doesn't.Thu, 28 May 2026 00:00:00 GMThttps://crashtestdev.com/posts/a-compromised-server-cant-inject-code/https://crashtestdev.com/posts/a-compromised-server-cant-inject-code/The manifest server tells browsers which chunks to fetch. If an attacker owns it, they can redirect to existing content-hashed chunks. They can't inject new code. The signature covers the chunk hashes, not the advisory fields.Thu, 28 May 2026 00:00:00 GMThttps://crashtestdev.com/posts/we-shipped-40-percent-less-javascript/https://crashtestdev.com/posts/we-shipped-40-percent-less-javascript/Every bundler claims to tree-shake. Most eliminate unused modules. Cloudpack eliminates unused exports within alive modules using a call-edge graph. The difference: 40% less shipped JavaScript.Thu, 28 May 2026 00:00:00 GMThttps://crashtestdev.com/posts/your-users-are-already-telling-you-how-to-bundle/https://crashtestdev.com/posts/your-users-are-already-telling-you-how-to-bundle/Every browser session is telling you which chunks belong together. The co-request matrix from real traffic drives chunk grouping. No rebuild required. The optimization loop runs on live data.Thu, 28 May 2026 00:00:00 GMThttps://crashtestdev.com/posts/ai-commoditizes-features-but-judgment-compounds/https://crashtestdev.com/posts/ai-commoditizes-features-but-judgment-compounds/AI raises the floor dramatically. It does not flatten the ceiling. The profession that survives is the one hardest to demo without, not just hardest to do without.Wed, 27 May 2026 00:00:00 GMThttps://crashtestdev.com/posts/node-modules-in-a-content-addressed-store/https://crashtestdev.com/posts/node-modules-in-a-content-addressed-store/Your CI caches node_modules as a tarball. One package changes, you re-upload everything. Per-package content-addressed storage with hardlink restore is the fix.Wed, 27 May 2026 00:00:00 GMThttps://crashtestdev.com/posts/two-phase-fingerprinting-buildxls-deep-magic/https://crashtestdev.com/posts/two-phase-fingerprinting-buildxls-deep-magic/Weak fingerprints find candidates. Strong fingerprints verify them. The pathset is the bridge. This is how you build a cache that can't lie.Wed, 27 May 2026 00:00:00 GMThttps://crashtestdev.com/posts/hooking-syscalls-without-a-kernel-driver/https://crashtestdev.com/posts/hooking-syscalls-without-a-kernel-driver/Three operating systems. Three interception mechanisms. One goal: watch every file a build task touches without root, without a kernel module, with single-digit overhead.Wed, 27 May 2026 00:00:00 GMThttps://crashtestdev.com/posts/typescript-7-makes-the-build-harness-more-important/https://crashtestdev.com/posts/typescript-7-makes-the-build-harness-more-important/tsgo is 10x faster on one machine. But builds don't run on one machine. The bottleneck just moved, and it moved toward the harness.Wed, 27 May 2026 00:00:00 GMThttps://crashtestdev.com/posts/what-i-learned-maintaining-lage-and-why-i-rewrote-it/https://crashtestdev.com/posts/what-i-learned-maintaining-lage-and-why-i-rewrote-it/I co-created lage at Microsoft. It's used across the company. Its architecture has a fundamental flaw that I could only fix by starting over.Wed, 27 May 2026 00:00:00 GMThttps://crashtestdev.com/posts/your-build-cache-is-lying-to-you/https://crashtestdev.com/posts/your-build-cache-is-lying-to-you/Every JS monorepo build cache works the same way: hash what you told it to hash. If you forgot to tell it about a file, the cache lies. Silently. For months.Wed, 27 May 2026 00:00:00 GMThttps://crashtestdev.com/posts/speeding-up-webpack-typescript-incremental-builds-by-7x/https://crashtestdev.com/posts/speeding-up-webpack-typescript-incremental-builds-by-7x/How the Outlook team at Microsoft cut incremental build times from 35s to 5s by defeating four performance enemies in the Webpack pipeline.Fri, 16 Aug 2019 00:00:00 GMThttps://crashtestdev.com/posts/localize-react-without-bloating-the-bundle/https://crashtestdev.com/posts/localize-react-without-bloating-the-bundle/A performant approach to React localization using dynamic imports and react-intl-universal, keeping your main bundle free of locale strings.Fri, 16 Aug 2019 00:00:00 GMT