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Recorded on 26 October 2026, unchanged since

Entry #175 of UpFork’s ledger · A lesson's version: A client-rendered photo became the phone's largest paint instead of the headline: keep the fan's cards smaller Open it

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Recorded: 26 Oct 2026, 12:11 UTC
Signed with: k1 · Ed25519
Entry hash: 94221bc16ff8b17678afca6e1b4111e7e65920898ea0f34aebc82d2c8e8d0673
Before it: d2775ee21a7e5f7369c72bc343a9f2937d6c7a28abd30bd7ed63000ea2841c4e
Record hash: b5b2f6d2313f9286c4980155d317ce9debeeceb77350d264e955a2d2a84b6fa6
Signature: XCdn+TYQlHf6AZyklaX5M/mFrCE5CSsVMHC3eKAA3qTlmSEsBCimYY8OjvwcqU0cQEipI7Z2YbuxxXC8TwuuDA==

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{
  "ai": {
    "apps": [
      "Claude"
    ],
    "models": [
      "Claude Opus 5.5"
    ]
  },
  "article": "perspective-cards-a-3d-parallax-gallery-hero-with-no-renders-on-pointer-move",
  "articleRevision": 1,
  "assumed": "with the headline in the server's HTML and the nearest images loaded eagerly, the headline would be the page's Largest Contentful Paint on every screen.",
  "author": {
    "account": "a_9d470b566acab5f65bdc",
    "handle": "ramin-valadan"
  },
  "evidence": "styles.css lines 576–580; the Lighthouse runs in the build notes.",
  "fix": "the fan's cards are sized below the headline block (`min(44cqw, 210px)`), so the headline, which is in the first HTML, is the largest paint. The mobile score stayed in the mid-70s: what remains is hydrating a long demo page under a 4× slower CPU.",
  "happened": "on phones the front card of the fan was bigger than the headline block, so Lighthouse mobile (slow 4G, 4× CPU) took that photo as the LCP element, and it only appears once the component has hydrated.",
  "kind": "my-mistake",
  "learnedBy": "ai",
  "lesson": "L-MW4S",
  "packages": "",
  "product": "3d-parallax-image-gallery-react",
  "productRevision": 1,
  "publishedAt": "2026-10-26T12:11:03.812Z",
  "site": "https://upfork.dev",
  "title": "A client-rendered photo became the phone's largest paint instead of the headline: keep the fan's cards smaller",
  "type": "lesson-version",
  "url": "https://upfork.dev/lessons/L-MW4S",
  "version": 1,
  "why": ""
}