加速clojure启动时间与nailgun

问题描述

不管怎么说，我认为对于 shell脚本使用 clojure 会更好，但启动时间大约900ms慢。然后，我会为nailgun clojure执行 ，但显示的唯一结果是特殊情况vimclojure。这是当我，假装没有时间，转向更多 awk ward语言启动更快。

，如何使用 nailgun 加快clojure的启动时间？

解决方案

Debian

执行以下操作一次：

 code> apt-get install nailgun＃install nailgun 
 java -server -jar /usr/share/java/nailgun.jar& ＃run nailgun server 
 ng-nailgun ng-cp /usr/share/java/clojure-1.4.jar＃add clj to classpath 
  

现在服务器正在运行和配置，你可以运行你的clojure脚本：

  ng-nailgun clojure.main path / to / myscript.clj 
  

让运行实际脚本更方便，创建一个可执行文件 ng-clojure 包含以下行，并将其放在路径中的某处：

  ng-nailgun clojure.main$ @
  

在您的 clojure shell脚本，将此添加为第一行：

 ＃！/ usr / bin / env ng-clojure 
 

然后使clojure shell脚本可执行，并像

一样运行

  path / to / myscript.clj 
  

OSX

  brew install nailgun 
 ng-server 
 ng ng-cp〜/。 m2 / repository / org / clojure / clojure / 1.5.1 / clojure-1.5.1.jar 
  

然后执行上面的脚本。

更新：使用了一段时间后，它似乎无法正常工作。有时，我遇到的随机错误在没有钉枪的情况下不会发生，有时似乎有一个内存泄漏，使得nailgun JVM随时间消耗所有内存，最终使系统交换到磁盘。没有内存剖析这个，但想添加这个单元格。

Every now and then I think it would be nice to use clojure for shell scripts, but a startup time of about 900ms is way too slow. I'd then startpage for "nailgun clojure", but the only results that show up are for special cases like vimclojure. That's when I, pretending not to have time, turn to more awkward languages that start up faster.

So, how can nailgun be used to speed up the startup time of clojure?

解决方案

Debian

Do the following once:

apt-get install nailgun                          # install nailgun
java -server -jar /usr/share/java/nailgun.jar&   # run nailgun server
ng-nailgun ng-cp /usr/share/java/clojure-1.4.jar # add clj to classpath

Now that the server is running and configured, you can run your clojure scripts on it:

ng-nailgun clojure.main path/to/myscript.clj

In my case, startup time of the actual script went down to 80ms, compared to 900ms without nailgun.

To make running the actual script more convenient, create an executable file ng-clojure containing the following line, and put it somewhere in your path:

ng-nailgun clojure.main "$@"

In your clojure shell script, add this as the first line:

#!/usr/bin/env ng-clojure

Then make the clojure shell script executable and run it like

path/to/myscript.clj

OSX

brew install nailgun
ng-server
ng ng-cp ~/.m2/repository/org/clojure/clojure/1.5.1/clojure-1.5.1.jar

Then execute your script as above.

Update: Having used it for a while, it doesn't seem to work flawlessly. Sometimes I'm getting random errors that don't occur when running without nailgun, and sometimes there seems to be a memory leak that makes the nailgun JVM consume all memory over time, eventually making the system swap to disk. Haven't memory profiled this yet, but wanted to add this heads-up.

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