# 2.4.12 哈希映射类型

哈希映射表是一种非常快的查找表，表面上看和关联链表很相似，都是从键到值的映射，但是更快。哈希映射表的打印表示中包含了属性和内容，就像下面这样：

```
(make-hash-table)
    => #s(hash-table size 65 test eql rehash-size 1.5
                             rehash-threshold 0.8125 data ())
```

查看 哈希表章节，以获得更多的信息。


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://emacs-lisp.ivory.cafe/lisp-shu-ju-lei-xing/bian-cheng-lei-xing/2.4.12-ha-xi-ying-she-lei-xing.md?ask=<question>
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The question should be specific, self-contained, and written in natural language.
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Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
