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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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device lacks.
A relay that speaks it compares the ids it holds for a filter with the ids we hold and answers with the difference — a few hundred bytes, one round — instead of re-serving its newest events every time we ask. Measured on relay.coinos.io: the DM subscription re-served 200 gift wraps (468 KB) on every boot and every resubscribe, the Notifications refresh 120 events (105 KB) a visit; a reconcile holding the newest 100 of 120 found the 20 missing in 1.8 KB and 41 ms.
src/negentropy.js: the protocol (version 1, as strfry speaks it), a port of Doug Hoyte's reference client (MIT): NegSet of [created_at, id] items, Negentropy.initiate / reconcile → { next, have, need }, WebCrypto SHA-256. Byte-identical opening message to the reference's; seven pairings of ours and theirs as client and relay agreed on every have/need.
src/nostr.js: reconcileOn(url, filter, items) on its own socket (the pool's parser has no ear for NEG-* frames) → { need, have } or null; a relay that doesn't speak it (NOTICE "negentropy disabled", CLOSED, a socket shut on the opening message, silence) is remembered for a day in coinos-neg-off, so the plain query goes straight out there next time; NEG-ERR blocked/closed is not remembered. syncOn(relays, filter, items): reconciliation where it works, the plain query where it doesn't, the ids we lack fetched by id in slices, each event once, verified.
messages.js — DMs: relay by relay, one that speaks it gets the live subscription with limit 0 (opened first, so nothing slips between) and a reconcile of its newest 400 against wrapItems (the wraps held, full id and time, 600 kept beside the 16-char prefix log; a wrap the prefix log knows but the list doesn't is added as the relay re-serves it, once); nos.lol, with negentropy disabled, keeps the plain subscription with its backlog, and so does every relay while the one-time heal pass runs. Notifications: the refresh reconciles the relay's newest 120 against notifHeld (every notification event seen, 300 kept — not just the rows, or a folded zap twin would come back every visit), persisted beside the rows; the watch is unchanged. Not applied to feeds: the outbox relays mostly lack it (nos.lol, damus, primal, nostr.wine, nostr.mom, nostrplebs say no; relay.coinos.io, purplepag.es, ditto, oxtr, nostr21, offchain yes) and a first older page has nothing to reconcile against.
Tests: tools/negentropy-test.js (the reference's bytes, one round for a small difference, eight for a 4 KB frame, nothing to say when equal); tools/negentropy-sync-test.js (an in-page relay speaking NEG with the library on its side: the wrap subscription opens limit 0 and the three wraps lacked are fetched by id, nos.lol's "disabled" gets the plain subscription and is remembered, the boot refresh fetches the three notifications by id and the page's refresh and a refresh after reload fetch nothing). notif-report-fold, notif-faces, dm-filter, dm-row-resort, dm-nip42 pass.
Co-Authored-By: Claude Fable 5.1 <[email protected]>
Claude-Session: https://claude.ai/code/session_01J1Kon8bxJoHRpJdSzshCkp
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