启动时间很短 [英] Slow startup time

问题描述

有什么方法可以加快Groovy的启动时间？ （除了使用某种独立运行的Groovy进程，如前所述）。

我并不在意执行时间，但缓慢的启动正在使它无法在Groovy中为我开发。

在我的机器上使用Groovy和Ruby启动和运行一个空脚本之间的简单比较：

  $ time groovy -e
 real 0m5.678s 
用户0m6.468s 
 sys 0m0.456s 
 
 $ time ruby​​ -e
 real 0m0.023s 
 user 0m0.020s 
 sys 0m0.004s 
  

我使用存储库中的标准软件包来运行Ubuntu 11.10。

  $ groovy -v 
 Groovy版本：1.7.10 JVM：1.6.0_23 
 
 $ cat / etc / lsb-release 
 DISTRIB_ID = Ubuntu 
 DISTRIB_RELEASE = 11.10 
 DISTRIB_CODENAME = oneiric 
 DISTRIB_DESCRIPTION =Ubuntu 11.10
 
 $ java -version 
 java版本1.6.0_23
 OpenJDK Runtime Environment（IcedTea6 1.11pre）（ 6b23〜pre11-0ubuntu1.11.10.1）
 OpenJDK 64位服务器虚拟机（内置20.0-b11，混合模式）
  

解决方案

这是JVM开销的结合，加上groovy自己的启动时间。将 -noverify 标志添加到JVM选项会关闭字节码验证，这会产生显着差异。设置 JAVA_OPTS 环境变量为 -noverify 以便groovy使用它。

还有一个在后台运行服务器进程的项目来解决这个问题： http：// kobo.github.com/groovyserv/

Is there any way to speed up the startup time of Groovy? (Except using the some kind of separate running Groovy process, as has been suggested).

I don't care much about execution times, but the slow startup is making it impossible to develop in Groovy for me.

A simple comparison between starting and running an empty script, using Groovy and Ruby on my machine:

$ time groovy -e ""
real   0m5.678s
user   0m6.468s
sys    0m0.456s

$ time ruby -e ""
real   0m0.023s
user   0m0.020s
sys    0m0.004s

I am running Ubuntu 11.10 using the standard packages in the repositories.

$ groovy -v
Groovy Version: 1.7.10 JVM: 1.6.0_23

$ cat /etc/lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=11.10
DISTRIB_CODENAME=oneiric
DISTRIB_DESCRIPTION="Ubuntu 11.10"

$ java -version
java version "1.6.0_23"
OpenJDK Runtime Environment (IcedTea6 1.11pre) (6b23~pre11-0ubuntu1.11.10.1)
OpenJDK 64-Bit Server VM (build 20.0-b11, mixed mode)

解决方案

This is a combination of JVM overhead, plus groovy's own startup time. Adding the -noverify flag to the JVM options turns off bytecode verification, which makes a noticeable difference. Set the JAVA_OPTS environment variable to -noverify to get groovy to use it.

There's also project to run a server process in the background to get around this: http://kobo.github.com/groovyserv/

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