Feat/debounce preview #40
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ompugao
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…cheduling to avoid redundant live updates
Add ContentDebouncer that adjusts debounce delay based on previous parse/render time for each file: - Debounce = parse_time * 2.0 (clamped to 5-500ms range) - Default: 20ms for files not yet parsed - Max wait: 2000ms to ensure responsiveness Slower files (larger/complex) get longer debounce to avoid overwhelming the system, while faster files get quicker feedback. The debouncer is shared between LSP backend and WebSocket handler to track parse times across the system.
Add handle_live_file_change_lightweight() that only broadcasts content without recalculating backlinks and two-hop links. This significantly reduces CPU overhead for large files (~9000 lines) during rapid typing. The full link calculation (handle_live_file_change) is still available for use after idle periods or on file save.
- First keystroke → flush immediately, update last_flush_at - Subsequent keystrokes within debounce period → update pending text, schedule ONE timer (only on first pending) - Timer fires → flush latest text (whatever was last typed), clear pending - Next keystroke after timer fires → if debounce period passed, flush immediately again
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