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of it. "When I flick to scroll, it's not getting up to speed very quickly, and clicking around in the app feels a bit sluggish at times" (Adam, 2026-11-07). Measured on his Pixel 9 in the installed PWA: idle is quiet (0.16 s of script in 10 s), but three real flicks through Following spent 1.7 s of 9 on the main thread, frames up to 200 ms, and the work was the avatar thumbnailer finishing faces as they scrolled in: a synchronous canvas.toDataURL WebP encode per face (229 ms), the profile cache JSON.stringified twice per half-second flush (once just to measure it, up to ~2 MB with thumbnails), and a whole-page repaint per finished face that changes nothing on screen (feed rows keep the face they were admitted with). Now: the crop, resize and encode happen off the main thread (createImageBitmap with resizeWidth/Height, OffscreenCanvas.convertToBlob, FileReader), with the old canvas path as the fallback; a finished face is recorded once the page settles; scheduleRepaint holds while a finger is down or the page scrolled in the last 200 ms (at most 1.5 s), and the profile flush likewise (at most 5 s, forced on an account switch) and sizes the blob by summing rows instead of stringifying it. Tests: the create flow's heads-up / passphrase / check steps from earlier today broke every test that made a wallet by waiting for the words and clicking "Skip verification"; tools/puppeteer.js exports seedWords() and skipSeedCheck() and the 96 tests use them. room-faces and avatar-profile fail the same way on 8858591 (row.hover, scrollIntoView), before today's changes
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01VMan6Ts5Tktega8VbLg31q
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A suite run let ~90 throwaway test wallets subscribe and publish on public
relays from one home address, and nos.lol and relay.damus.io banned it.
tools/puppeteer.js wraps puppeteer-core: every socket to a non-local host
gets an in-page stand-in relay (EVENT -> OK, REQ -> EOSE). Tests that read
real content launch with { relays: 'read' } (real reads, publishes answered
in place); feed-live, chat-layout and cordn-ui launch with { relays: 'live' }.
LIVE_RELAYS=read|1|host,... overrides per run.
profile-key-qr: measure the QR again if a repaint swapped it out.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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The feed left the chat home for a bottom-nav tab, and a wallet with no
feed remembered opens on Popular, so these tests click the Feed tab and
seed Following as the wallet's last feed. Also brought up to date:
- feed-live: the pill lands on the oldest new post; arrivals at the top go
in above the first post (held still), not behind the pill; scroll up a
screen at a time (one jump lands before the windowed rows are back)
- feed-custom: only the feeds' chips are counted (not All/Images/…); the
follows box is not the first checkbox any more; the last feed is
remembered across a reload; the pack shows in the feed's editor (the chat
home no longer lists the feed)
- feed-follow: Feed tab + Following chip instead of the messages-home row;
the feed opens at ten posts (tall ones, so a page doesn't fill the screen)
- moderation: nos.lol is a local stand-in (a relay that won't connect held
the mute list back past the checks)
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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Co-Authored-By: Claude Fable 5.1 <[email protected]>
Claude-Session: https://claude.ai/code/session_01VhUKyXKtsJ67QAFfb7QR9D
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A long scroll left hundreds of rows mounted, and every repaint (a zap
count, a profile landing, the thirty-second sync) rebuilt and diffed all
of them — the slowdown deep in the feed. Rows beyond two and a half
screens either side of the viewport are now replaced by a spacer at their
measured height, so the page keeps its length (scrollbar, Back, arrival
anchoring behave as before) while a repaint touches a few dozen rows.
After svelte-virtual-list: measure after paint, estimate unmeasured rows
at the running average, hold the reader's row still when a measurement
corrects an estimate. Applies to the profile notes list too.
Tests: feed-window-dom (120 posts, 27,800px page, 12–24 rows mounted,
anchor held, spacers both sides); feed-live looks at the top after
scrolling up; the moderation test's stub relay no longer lets real posts in.
Co-Authored-By: Claude Fable 5.1 <[email protected]>
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