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Idea: Coalesce cache scans for batched source removal

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まだ誰も着手していません。

評価

難易度
5/5
見積もり時間
1週間以上
初心者へのやさしさ
25/100
issue の種類
機能追加
明瞭さ
おおむね明確
活発さ
活発
技術スタック
rust
領域
compilers

調査の方向性

No source files, tests, or entry points are named. Begin by collecting a real branch-switch or folder-removal trace, then measure time to fresh diagnostics as requested; the work is justified only if it shows a noticeable stall and preserves mixed-event ordering.

索引モデルが issue の本文から書いたものです。

説明

ideas

Deferred idea

Removing a source file currently scans module ownership and the derived-query caches to discard affected entries. When one batch removes many warmed sources, those scans run again for every file. Consecutive removal-only events could be coalesced and retired together, so each cache is scanned only once. Any other event would first flush the pending removals, which keeps mixed-event ordering intact.

This is an idea to evaluate later, not a request to land the existing prototype.

Evidence so far

The benchmarks used real sources from the combined core+acme dependency closure: 631 packages and 7,371 sources, with modules checked before removal. The deletion scenarios themselves were constructed. They show the algorithmic cost but don't show a common workflow. For example, removing 100 sources cut the LSP watched-file handler median from 287 ms to 38 ms. Removing a single source doesn't benefit.

Why defer

  • Deletions in a repository are usually sparse. Restarting the language server is a reasonable workaround for an occasional large batch.
  • Branch switching might benefit, but it hasn't been measured. It also produces a mix of events rather than long runs of removals.

Revisit this after a real branch-switch or folder-removal trace shows a noticeable stall. At that point, measure the time to fresh diagnostics rather than claiming full-editor or cold-build gains.

Detailed measurements and prototype patches are in the investigation thread (Amp access required).

主要言語
Rust
スター
123
フォーク
12
平均マージ
7時間 3分
マージ済み PR(30日)
110

環境構築

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