2025 年了,你们用上 Virtual Threads 了吗 - V2EX
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ljzxloaf
V2EX    Java

2025 年了,你们用上 Virtual Threads 了吗

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  •   ljzxloaf 275 天前 2526 次点击
    这是一个创建于 275 天前的主题,其中的信息可能已经有所发展或是发生改变。
    限企业项目,生产环境。

    用过的彦祖分享下使用方法、性能收益、踩过的坑啥的
    3 条回复    2025-05-26 19:22:46 +08:00
    sagaxu
        1
    sagaxu  
       275 天前
    https://openjdk.org/jeps/444#Pinning

    There are two scenarios in which a virtual thread cannot be unmounted during blocking operations because it is pinned to its carrier:

    When it executes code inside a synchronized block or method, or
    When it executes a native method or a foreign function.

    第一个坑: https://openjdk.org/jeps/491 ,首个解决此问题的 JDK LTS 版本是 25 。
    第二个坑:目前没有办法根治,知名库如 netty 的 native 代码应该能比较快发现和解决。

    所以还是再等等吧,反正已经用上 Kotlin 协程了,等 virtual threads 成熟了拿来当阻塞 IO 的 dispatcher 用
    Executors.newVirtualThreadPerTaskExecutor().asCoroutineDispatcher()
    niubiman
        2
    niubiman  
       274 天前
    java 真是遥遥领先
    raodao
        3
    raodao  
       136 天前
    @niubiman 你最好真的是这样子想的
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