23 Performance Optimization

23. Performance & Optimization Architecture

Engineering specifications for application speed, database index tuning, and offline performance optimization in PACT OS.

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⚡ High-Performance Architecture Overview

PACT OS is optimized for sub-100ms interactions and zero-latency local operations:

graph TD
    Request[User Action] --> ServerComponent[Next.js Server Component]
    ServerComponent -->|Parallel Data Fetching| DB[(PostgreSQL Indexed Queries)]
    ServerComponent -->|Stream HTML| Browser[Browser Render]
    Browser -->|Offline Sound Synth| WebAudio[Web Audio Context]
    Browser -->|URL Search Params| URLState[useUrlState Hook]

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🚀 Key Performance Strategies

1. Hybrid Server / Client Component Split

• Server Components: Handle data fetching, layout rendering, and security checks on the server, eliminating client-side bundle bloat.
• Client Components: Isolated exclusively to interactive inputs, modal dialogs, and timers.

2. Database Index Tuning (20260911060000_production_hardening_and_cron_schedule.sql)

PostgreSQL indexes are optimized for common query patterns:

• Composite index on tasks(user_id, status, deadline_at) for deadline sweeper cron scans.
• Index on finance_transactions(user_id, transaction_date) for fast cashflow aggregations.
• Index on habit_logs(habit_id, completed_at) for streak math.

3. Zero-Asset Audio Engine (src/lib/focus/sound.ts)

• Deep work audio is synthesized in real-time via the browser's native AudioContext.
• Saves bandwidth by downloading 0 MB of audio files.

4. URL as State (useUrlState)

• Filters, active tabs, and date windows are bound to URL query parameters.
• Eliminates global state re-render cascades across un-related UI components.