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Idea: Coalesce cache scans for batched source removal

Abierto
  • ¿Algo no está bien?
#620 0 comentarios 0 reacciones 0 asignados Ver en GitHub

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Evaluación

Dificultad
5/5
Tiempo estimado
Más de una semana
Aptitud para principiantes
25/100
Tipo de issue
Nueva funcionalidad
Claridad
Bastante claro
Estado de actividad
Activo
Stack tecnológico
rust
Área
compilers

Línea de trabajo

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.

Escrito por el modelo de indexación a partir del texto del issue.

Descripción

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).

Lenguaje dominante
Rust
Estrellas
117
Forks
11
Merge medio
4 h 27 min
PR fusionados (30 d)
123

Preparar el entorno

Primeros pasos

  1. Lee el issue completo y luego la guía de contribución del proyecto.
  2. Comenta en el issue que vas a ocuparte — evita que dos personas hagan lo mismo.
  3. Haz un fork del repositorio y trabaja en una rama.
  4. Abre un pull request que haga referencia al número del issue.

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