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Tommaso CasaburiandGitHub da03239bb2 perf: reduce browsing rerenders and startup cost (#1189) 
* chore(profiling): collect serializable react-scan reports

* perf(routing): rerender only when directory winner changes

* perf(zustand): remove shallow warning hot path

* perf(state): narrow directory lifecycle updates

* perf(home): avoid redundant stats render work

* perf(posts): isolate live loading subscriptions

* perf(chrome): skip unchanged shell rerenders

* fix(profiling): drop unsupported render metric

* perf(feeds): skip unchanged loading state renders

* perf(home): stop resolved stats collector renders

* chore(agent run): record rerender verification

* perf(home): defer stats requests until metadata resolves

* perf(startup): load protocol modules on demand

* chore(agent run): record acquisition and startup profiles
2026-07-30 00:29:12 +07:00

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Progress Log

2026-07-30 00:04 HKT

  • Item: F003
  • Summary: Resumed after the permission interruption and completed controlled post-fix /all and /all/catalog profiling. The selector-scoped loading text fix removes the hidden and visible footer loops while preserving feed ordering, scroll anchoring, exact back/forward restoration, mobile width, and search interaction.
  • Files: src/hooks/use-state-string.ts, src/hooks/__tests__/use-state-string.test.tsx, src/lib/bitsocial-internals/utils.ts
  • Verification: ./scripts/agent-init.sh --smoke; fresh Chromium /all load and five-second idle profile; /all ordering and 15-second anchor check; fresh /all/catalog idle and cached back/forward profile; desktop and mobile Firefox/WebKit smoke checks
  • Blockers: none
  • Next: Complete F004 by making homepage community-stat collectors dormant after resolving the current statsCid, then reprofile the loaded homepage.

2026-07-30 00:17 HKT

  • Item: F004, F005
  • Summary: Split homepage stat collection into a CID-selecting wrapper and a request component that unmounts after the current stats CID resolves. A changed CID remounts the request and ignores the previous CID's cached result until the data hook publishes a fresh object. The 64-board homepage is now fully idle instead of continuously committing collector updates.
  • Files: src/hooks/use-communities-stats.ts, src/hooks/__tests__/use-communities-stats.test.ts
  • Verification: corepack yarn test --configLoader runner; corepack yarn lint; corepack yarn type-check; corepack yarn build; corepack yarn doctor --scope changed --base master; React best-practice and effect reviews; code-quality review; fresh Chromium homepage profiling; mid-tier throttled Chromium homepage and /all; desktop and 390px mobile Firefox/WebKit homepage smoke checks
  • Blockers: none
  • Next: Keep acquisition-phase decentralized provider work and cold bundle loading as separate follow-up opportunities; this task's excessive steady-state rerender loops are resolved.

2026-07-30 01:06 HKT

  • Item: F006
  • Summary: Added one shared homepage metadata loader and held each stats request until its stable stats CID exists. This removes the pre-CID request lifecycles and key-driven restarts while preserving refreshes when a CID changes.
  • Files: src/hooks/use-communities-stats.ts, src/hooks/__tests__/use-communities-stats.test.ts, src/views/home/home.tsx, src/views/home/__tests__/home.test.tsx
  • Verification: focused tests; full 1,374-test suite; lint; type-check; build; scoped React Doctor; React best-practice, effect, and code-quality reviews; fresh acquisition profiles; desktop and mobile Chrome, Firefox, and WebKit homepage checks
  • Result: First-twenty-second commits improved from 1,211 to 862 (-29%), CommunityStatsRequest renders improved from 1,569 to 491 (-69%), all 64 boards resolved at 21.06s, and the following five seconds were commit-free.
  • Blockers: none
  • Next: Establish a production-build cold-start baseline before changing startup code.

2026-07-30 01:06 HKT

  • Item: F007
  • Summary: Removed the forced whole-package protocol chunk so the browser can render the homepage from the smaller hook/core graph and load deeper decentralized protocol modules on demand.
  • Files: vite.config.js
  • Verification: controlled Brotli production-build A/B with service workers blocked and identical 4x CPU plus mid-tier network throttling; final production build; lint; type-check; production desktop and mobile checks in Chrome, Firefox, and WebKit
  • Result: First content improved from 8.31s to 4.66s, LCP from 8.37s to 4.72s, DOMContentLoaded from 4.97s to 1.07s, load from 5.63s to 1.83s, long-task time from 1.85s to 1.51s, and PWA precache from 4.06 MiB to 439.45 KiB. The full board list remains present while decentralized stats continue resolving.
  • Blockers: none
  • Next: None; F001-F007 are verified.
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