[中] 设置变化触发的后台重建线程无法取消，可能并行多个
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Assessment
- Difficulty
- 3/5
- Estimated time
- Half a day
- Newbie friendliness
- 65/100
- Issue type
- Refactor
- Clarity
- Clearly specified
- Activity status
- Active
- Tech stack
- python
- Domain
- desktop, performance
Research direction
Start at windows/birdlock/app/state.py:760-792, reading _rebuild_now() and the _job_gen counter, then find the existing LatestOnly helper the report says already lives in the project and see how it is used elsewhere. Trace how RenderJob is constructed inside the spawned work() so you know where a stale generation can return early. Done means dragging the slider on a long sequence keeps at most one rebuild thread alive and abandoned generations exit before doing the render work; the report was derived from an audit, not reproduced on Windows, so verify thread count by hand.
Written by the indexing model from the issue text.
Description
位置：windows/birdlock/app/state.py:760-792
现象：_rebuild_now() 每次 _job_gen += 1 后新开 threading.Thread，旧线程仍会完整构造 RenderJob，只是 done() 因 gen 不匹配丢弃结果。拖动滑块时若单次构建超过 60 ms，会累积多个线程与大量 CPU/IO。
复现：在长序列上快速拖动滑块，观察线程数与 CPU。
建议：改成单线程「只保留最新任务」的 worker（项目里已有 LatestOnly 实现），或在 work() 开头检查 gen 已过期即返回。
来源：2026-11-15 全仓只读审计，PR #7 未包含此项。 未在 Windows 实机复现，复现路径由代码审计推得。
- Dominant language
- Swift
- Stars
- 2
- Forks
- 2
- Avg merge
- 1h 11m
- Merged PRs (30d)
- 2
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