perf: Filters:custom calls getcwd for every file, even with no custom filters

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已經有一個關聯 PR 被合併了。

  • #3387 來自 @hood —— 已合併

評估

難度
2/5
預估耗時
1-3 小時
新手友好度
25/100
Issue 類型
缺陷
描述清晰度
描述清楚
活躍度
停滯
技術堆疊
lua, neovim
領域
performance

研究方向

Start with lua/nvim-tree/explorer/filters.lua, especially Filters:custom and Filters:prepare; the issue identifies the repeated vim.uv.cwd() call and proposes resolving it once per directory only when custom patterns exist. Check the existing filtering tests and add coverage for empty and nonempty custom patterns. Done when filtering behavior stays the same and the unnecessary cwd calls are avoided; pull request #3387 is already open for this issue.

由索引模型根據 Issue 內容生成。

描述

Problem

Filters:custom calls vim.uv.cwd() for every file that gets scanned, via utils.path_relative(path, vim.uv.cwd()) (lua/nvim-tree/explorer/filters.lua:180). This happens even when filters.custom is empty, the default, so the result is never used.

getcwd is slow on some platforms: about 61µs per call on macOS.

Impact (profile on master)

Operation Share of time on this line
api.tree.expand_all() 33%
Explorer:reload_explorer() 42%

Proposed fix

  • Return early from Filters:custom when there are no custom patterns.
  • Resolve the cwd once per directory in Filters:prepare, and only when there are custom patterns.

Filtering behaviour stays the same.

Happy to follow up with a PR as soon as I get some time.

Environment: macOS, Nvim v0.13.0-dev, LuaJIT 2.1. Test repo: 16.8k files and folders, 3.1k git status entries (modified, untracked, ignored). Measured headless with vim.uv.hrtime() and the LuaJIT profiler (jit.p).

主要語言
Lua
星號
8.7k
分支
642
平均合併
1 天 58 分鐘
30 天內合併 PR
12

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