From e905e5be5b2a0385e89de5ab3c0d95a917307314 Mon Sep 17 00:00:00 2001
From: Adam Soltys <adam@coinos.io>
Date: Sat, 7 Nov 2026 09:47:20 -0700
Subject: A flick through the feed no longer drags background work through the
 middle 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 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VMan6Ts5Tktega8VbLg31q
---
 tools/thread-instant-test.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'tools/thread-instant-test.js')

diff --git a/tools/thread-instant-test.js b/tools/thread-instant-test.js
index bd80408..e9a9138 100644
--- a/tools/thread-instant-test.js
+++ b/tools/thread-instant-test.js
@@ -3,7 +3,7 @@
 // is seeded from them — the relays only add to it. A thread with nothing in
 // hand paints its replies as they arrive, not after the slowest relay.
 // Run: bun tools/thread-instant-test.js
-import puppeteer from './puppeteer.js';
+import puppeteer, { seedWords, skipSeedCheck } from './puppeteer.js';
 import { cacheKeyFor } from '../src/wallet.js';
 import { generateSecretKey, getPublicKey, finalizeEvent } from 'nostr-tools/pure';
 import { buildHtml } from '../build.js';
@@ -95,9 +95,9 @@ try {
   await page.reload({ waitUntil: 'domcontentloaded' });
   await sleep(400);
   await click('create a new wallet'); await sleep(600);
-  await page.waitForSelector('.words .w .t');
+  await seedWords(page);
   const mn = (await page.$$eval('.words .w .t', (l) => l.map((e) => e.textContent.trim()))).join(' ');
-  await click('skip verification');
+  await skipSeedCheck(page);
   await waitText('receive', 20000);
   const base = cacheKeyFor(mn + '\n');
   await page.evaluate(([k, alice, bob, carol, notes]) => {
-- 
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