feat(LanguageServer): debounce onDidChangeWatchedFiles events#1626
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bartvandenende-wm wants to merge 3 commits intorokucommunity:masterfrom
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feat(LanguageServer): debounce onDidChangeWatchedFiles events#1626bartvandenende-wm wants to merge 3 commits intorokucommunity:masterfrom
bartvandenende-wm wants to merge 3 commits intorokucommunity:masterfrom
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When the client sends rapid successive file change notifications (e.g. during VCS operations, package installs, or bulk builds), the language server now accumulates changes in a buffer and flushes them after a configurable debounce window (default 300ms). This reduces redundant work by batching multiple notifications into a single processing pass instead of handling each one individually. Key changes: - Add pendingFileChanges buffer and configurable fileChangeDebounceDelay - Debounce timer resets on each new event, coalescing rapid changes - rebuildPathFilterer is called at most once per batch - Cleanup timer on dispose Co-authored-by: Cursor <cursoragent@cursor.com>
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Feb 16, 2026
Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
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Context
In large multi-project workspaces, rapid file-system events (e.g. git operations, bulk saves) each trigger a full processing cycle fanned out to all projects, causing CPU spikes. This is part 1 of 3 targeted improvements to language server performance at scale (Part of #1625).
Summary
Debounces
onDidChangeWatchedFilesto collapse rapid successive events into a single batched processing cycle.PathFiltererat most once per batch when config files changeTest plan
handleFileChangescallrebuildPathFilterercalled at most once per batch