You've seen several common memory leak patterns involving circular references and some easy ways to work around them.
您还了解了涉及到循环引用的一些常见内存泄漏模式以及应对这些泄漏模式的几种简单方式。
One he highlighted was a common developer error when working with Lucene: an apparent memory leak caused by the developer failing to close an IndexReader.
他所强调的第一种应用就是用其发现普通开发者使用Lucene时的常犯错误：没有关闭IndexReader而导致的内存泄漏。
A common misconception that users have is that any third-party library written in GWT magically runs fast, is completely leak free, and renders perfectly on all browsers.
用户有一个常见的误解：任何用GWT编写的第三方库都会如魔法般快速运行，它们是完全无泄漏的，而且在所有浏览器上都能完美展现。
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