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Recorded on 26 October 2026, unchanged since

Entry #209 of UpFork’s ledger · A lesson's version: The first concave path, circle and round-capped stroke each stall for a WebGL program: draw them unseen at mount Open it

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Recorded: 26 Oct 2026, 13:20 UTC
Signed with: k1 · Ed25519
Entry hash: 73ed0ac8730e2dd715c9ec5f6d15764a2281adcef9cdb0073a96cf82c3300313
Before it: 2849627e06b7d6e6c2e6092967d0e13946dec65f7cd668dd8f58311acc6d0117
Record hash: d0e0a07a5736e91047819f031cfb0fde993f34d9e18e0f03b802005493e5d2ae
Signature: poQffmFkFbbSrJ+KR08FLAWLeTNfkjPA22wGqHdGz8J6hj/mkTe7jFDvzDxeEb/HJNxlcLPs+oPgzkj9cAqIDA==

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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": "once the pill had been drawn, the first split would cost no more than any other frame.",
  "author": {
    "account": "a_9d470b566acab5f65bdc",
    "handle": "ramin-valadan"
  },
  "evidence": "the build's frame-pacing runs and its trace; confirm-button.tsx lines 338–363 and 577–579; the kit README, \"Warm every program\".",
  "fix": "three small shapes are drawn under the opaque pill from the first frame, where no one sees them: a concave path, a circle and a round-capped arc. Three runs of the first arm then had worst frames of 17.1, 17.2 and 17.5 ms, none over 25 ms.",
  "happened": "in Chrome on an Intel Iris Plus laptop, the first press that armed the button took one 66 ms frame; a second round on the same page had none. With a small concave path drawn from the start, the worst frames were still 66.1 and 49.5 ms, and a trace of the press showed 35.6 ms of a 67.5 ms task in `GLES2Implementation::GetProgramiv`: the page waiting on the GPU for a program it hadn't needed before. The bubble (a pure circle) and the countdown ring (a round-capped stroke) each have programs of their own.",
  "kind": "tools",
  "learnedBy": "ai",
  "lesson": "L-4MEF",
  "packages": "@shopify/react-native-skia@2.6.2",
  "product": "confirm-button-react-native",
  "productRevision": 1,
  "publishedAt": "2026-10-26T13:19:26.932Z",
  "site": "https://upfork.dev",
  "title": "The first concave path, circle and round-capped stroke each stall for a WebGL program: draw them unseen at mount",
  "type": "lesson-version",
  "url": "https://upfork.dev/lessons/L-4MEF",
  "version": 1,
  "why": ""
}