何时何地在Clojure代码中输入注释？

我所知道的最重要的原因是性能,在clojure中的类型暗示消除了反射,这可能会降低性能,所以我将类型提示放在我所测量的功能中,使其性能至关重要.

在 clojure.org 的 java 互操作部分有一个 description .在这些评论中：

Clojure supports the use of type hints to assist the compiler in avoiding reflection in performance-critical areas of code. Normally, one should avoid the use of type hints until there is a known performance bottleneck.
…  Once a type hint has been placed on an identifier or expression, the compiler will try to resolve any calls to methods thereupon at compile time. In addition, the compiler will track the use of any return values and infer types for their use and so on, so very few hints are needed to get a fully compile-time resolved series of calls. Note that type hints are not needed for static members (or their return values!) as the compiler always has the type for statics.

您可以随时打开反射标志的警告,以查看正在调用反射的位置,因此,类型提示可能会有所帮助.

编辑：

关于你的问题“只为java互操作？” – 没有.即使在纯粹的clojure应用程序中,类型提示也很有用.反思放慢性能的问题是JVM上的一个生命的事实,是动态语言一般要处理的问题.

关于何种类型的提示,可以从clojure.org：

They can be placed on function parameters, let-bound names, var names (when defined), and expressions: