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xhystc

xhystc

V2EX member #261943, joined on 2017-10-24 12:41:36 +08:00
xhystc's recent replies
根本原因是由于性能问题 cpu 在修改共享变量时不会等待其他 cpu 都确认缓存失效后才继续执行,其他 cpu 在收到失效请求后也不会立即应用失效,这就造成了不一致
Dec 4, 2020
Replied to a topic by vevlins 程序员 协程跟 cpu 有关系吗?
协程其实就是操作系统这门课所说的用户级线程换了个名词而已,我记得哈工大操作系统公开课有一节讲的是用户级线程的实现,那个就是协程的基本原理,本质就是用户空间的堆栈和 cpu 上下文的切换,没必要引入那么多名词和概念
不按收货地址投递违反快递法 楼主做的没错
Nov 20, 2018
Replied to a topic by Neojoke Java 大家怎么看待 Java 的未来
哈哈 我觉得楼主可以和之前中文编程那个楼主辩论一下,很想知道谁比较能说
按 500 一次算,每个月 6 次就回本了
会,当通过反射访问参数名时,如果参数名长达几个 g 肯定会影响效率的
Sep 14, 2018
Replied to a topic by wysnylc 问与答 子查询比无查询更快?
把子查询的 select 列表改成*试试
java 开发的话 8g 内存还是有点捉襟见肘,chrome+idea+虚拟机基本就能吃光 8g 内存
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