During the sweep phase, not only do references change, but objects move around in memory. This poses a new set of problems for application threads executing concurrently. Among these problems:
• Copying an object is not an atomic operation. This means that after part of the object has been copied, the original is still being modified by the application.
• Updating references to the object is not an atomic operation. This means that some parts of the application might be using the old object reference and some other parts might be using the new one.
Addressing these problems is possible (Azul Pauseless GC for JVM, http://www.azulsystems.com/zing/pgc, is one example), but has not been done in the CLR GC. It is simpler to declare that the sweep phase does not support application threads e... (查看原文)
1 有用 RednaxelaFX 2014-03-29 05:50:50
Sasha写的东西还挺靠谱的，这本书值得一推！
0 有用 acel 2013-10-04 22:54:40
算是同类书中，最深入的了吧，覆盖面也比较广。
0 有用 liufor 2014-05-10 17:00:15
你该认真读
0 有用 Kelvin Zhang 2015-04-16 11:16:18
开头介绍了performance metrics，介绍了一系列的benchmark和tools，很实用。接下来数据类型、垃圾回收、泛型、并发等进行了逐一分析。但最后几章关于网络、IO、web application部分的performance介绍的太少，略显浮光掠影。
0 有用 symphony 2013-03-16 18:10:54
该书没有对性能某一具体方面进行深入探讨,只是在整体上一扫而过.
0 有用 Kelvin Zhang 2015-04-16 11:16:18
开头介绍了performance metrics，介绍了一系列的benchmark和tools，很实用。接下来数据类型、垃圾回收、泛型、并发等进行了逐一分析。但最后几章关于网络、IO、web application部分的performance介绍的太少，略显浮光掠影。
0 有用 liufor 2014-05-10 17:00:15
你该认真读
1 有用 RednaxelaFX 2014-03-29 05:50:50
Sasha写的东西还挺靠谱的，这本书值得一推！
0 有用 acel 2013-10-04 22:54:40
算是同类书中，最深入的了吧，覆盖面也比较广。
0 有用 symphony 2013-03-16 18:10:54
该书没有对性能某一具体方面进行深入探讨,只是在整体上一扫而过.