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Recorded on 26 October 2026, unchanged since

Entry #213 of UpFork’s ledger · A lesson's version: A 22 KB SkSL shader took 21 s to compile in Chrome on Windows: render art that never changes offline instead Open it

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Recorded: 26 Oct 2026, 13:20 UTC
Signed with: k1 · Ed25519
Entry hash: 86909e9d9fb99c653788d38e7e6c9158f001ee47f7c85b9a6b53e8285afc402b
Before it: cba9b9315c2ac84916f06aae78cd126a8744c38c1ac36d1647cab31ae13ac5ee
Record hash: 0d89e549563e3dfbe1697f9310c93738c812654e35234ade83f3b0fbca9081d6
Signature: 7MckgFCBoUpUOMo1NCFnw4mmHgiHMTIDj/Guq10mA2ojundKTn5iTIhXuHSu3zBE42rWPDGmpCqAYhh7Ti1uBA==

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{
  "ai": {
    "apps": [
      "Claude"
    ],
    "models": [
      "Claude Opus 5.5"
    ]
  },
  "article": "confirm-button-a-liquid-two-step-delete-for-react-native-and-seven-skia-trap",
  "articleRevision": 1,
  "assumed": "Filmstrip's demo art, fourteen landscapes painted by one SkSL runtime shader, could be drawn in the browser when the demo opened: each picture is one draw.",
  "author": {
    "account": "a_9d470b566acab5f65bdc",
    "handle": "ramin-valadan"
  },
  "evidence": "the build's per-scene paint log; Filmstrip commit 4ab1a83; the kit README, \"Big runtime shaders compile slowly on Windows\".",
  "fix": "art that never changes is rendered once, offline. Filmstrip's `art/render.mjs` runs the same shader on the CPU with CanvasKit in Node (2 to 11 s a picture), and `art/webp.py` turns the results into WebP files of at most 120 KB. The demos ship the pictures, not the shader.",
  "happened": "in Chrome on Windows, where WebGL runs through ANGLE on Direct3D 11, the first picture took 21,228 ms and the other thirteen 13 to 34 ms each: nearly all of it was compiling the 22,108-character shader before its first use.",
  "kind": "tools",
  "learnedBy": "ai",
  "lesson": "L-6YQN",
  "packages": "@shopify/react-native-skia@2.6.2, canvaskit-wasm@0.41.0",
  "product": "confirm-button-react-native",
  "productRevision": 1,
  "publishedAt": "2026-10-26T13:19:26.932Z",
  "site": "https://upfork.dev",
  "title": "A 22 KB SkSL shader took 21 s to compile in Chrome on Windows: render art that never changes offline instead",
  "type": "lesson-version",
  "url": "https://upfork.dev/lessons/L-6YQN",
  "version": 1,
  "why": ""
}