Tencent/matrix

不主动调用Gc 通过finalize阶段通知队列更新是否可行

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#145 opened on Mar 21, 2019

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 (5 comments) (0 reactions) (1 assignee)Java (11,267 stars) (1,839 forks)batch import
help wanted

Description

ResourcePlugin中 Leakcanary是手动调用GC去poll 引用队列，gc后需要等待一段时间， 而ResourcePlugin也是手动GC检查创建引用指向的对象，在Debug的时候频繁GC不会导致抖动吗？是否可以在创建引用阶段交由引用对象的finalize，也就是有效的系统GC【GC请求可能被忽视】的时候，再去通知mDetectExecutor添加新的Task，这样除了结果不能第一时间得到，不会有任何影响

Contributor guide

Tech stack
java
Domain
performance
Issue type
research
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
needs investigation
Prerequisites
Java finalize机制Matrix ResourcePlugin引用队列实现
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20
Research direction
研究Java finalize方法的执行不确定性及其对引用队列更新的影响。对比当前手动GC方案与finalize方案在资源监控场景下的性能差异，注意finalize可能导致对象复活或延迟回收。可参考LeakCanary的GC触发策略及Matrix ResourcePlugin的现有实现（sample/src/.../ResourcePlugin.java）。与维护者沟通该方案是否已被验证或放弃。