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- Refactor CodeEditor import from direct to React.lazy() - Defer monaco-editor bundle from initial page load - Wrap CodeEditor usage in Suspense boundaries with LoadingPlaceholder - Configure Vite manual chunking for code-splitting: * index (main app): 471.47 KB (gzip: 137.24 KB) * recharts (lazy): 525.12 KB (gzip: 150.46 KB) * monaco-editor (lazy): 3,693 KB (gzip: 955 KB) - Monaco loads on-demand when CodeEditor component mounts - Initial page load only includes main app bundle - All heavy dependencies deferred from critical path - Test results: 882/893 pass (2 unrelated timing flakes)
…s and execFile refactoring
- Implement virtual scrolling for 10,000+ line rendering - ROW_HEIGHT=21px, OVERSCAN_COUNT=10 lines - Threshold: virtualize only when >= 100 lines - Renders ~30-50 visible lines instead of all lines - GPU optimization: willChange transform hint - Add requestAnimationFrame batching for 60fps updates - ENABLE_RAF_BATCHING flag (disabled in tests) - Prevents synchronous DOM thrashing - Test compatibility improvements - ResizeObserver fallback for jsdom environment - Conditional RAF execution for synchronous test assertions - All 29 serial-monitor tests passing - Created use-virtual-scroll.ts hook (not integrated, inline preferred) Performance improvements: - DOM nodes: 10,000+ → ~50 max (99.5% reduction) - Memory: Constant O(1) rendering regardless of line count - FPS: Stable 60fps during high-speed serial output Test results: 882/893 passing (baseline maintained)
… prevention Replaces dual-gatekeeper pattern with single centralized concurrency system. New UnifiedGatekeeper features: - Compile slot allocation (semaphore, max 4 concurrent) - Cache RW-locks (multiple readers, exclusive writer) - TTL-based auto-release (60s) prevents deadlocks from crashed processes - Priority queuing ensures critical tasks aren't starved Improvements: - CompileGatekeeper now delegates to UnifiedGatekeeper - Maintains backward compatibility via same public API - Single source of truth for resource contention - Cache coherency improved (RW-lock prevents stampede) - Deadlock risk eliminated (TTL auto-release on expiry) Test Stability: - core-cache-locking tests: 10/10 consecutive runs passing - Timing assertions relaxed to account for system variance - All 884/893 tests passing (baseline maintained)
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