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{{NoteTA
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{{Infobox software
| name = YARV
| title = YARV
| logo = 
| logo caption =
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| screenshot = 
| caption =
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| collapsible =
| author =
| developer = [[笹田耕一]]
| released = 
| discontinued =
| programming language = [[C语言|C]]<ref name="YARV-lang">{{cite web|url=http://www.atdot.net/yarv/oopsla2005eabstract-rc1.pdf|title=YARV: Yet Another RubyVM|last=Sasada|first=Koichi|publisher=atdot.net|accessdate=2013-08-18|archive-date=2020-09-25|archive-url=https://web.archive.org/web/20200925200305/http://www.atdot.net/yarv/oopsla2005eabstract-rc1.pdf}}</ref>
| operating system =
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| genre = Ruby[[虚拟机器]]
| license =
| website = {{URL|http://www.atdot.net/yarv/}}
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'''YARV'''是“[[Ruby]]程序语言”的一个[[字节码]]解译器，它是由[[笹田耕一]]领导的。YARV这个名称是“Yet another Ruby VM”（又一个Ruby虚拟机器）的首字母缩写。这个项目的目标是大幅度地减少Ruby程序的运行时间。

在YARV成为Ruby 1.9的官方解译器后，人们也称它为KRI（Koichi's Ruby Interpreter，Koichi的Ruby解译器）。

== 性能 ==
由rubychan.de給出的評分，可以看到YARV有著大幅的性能提升。<ref>[http://www.rubychan.de/share/yarv_speedups.html Benchmarks: Ruby 1.8 and Ruby 1.9] {{Wayback|url=http://www.rubychan.de/share/yarv_speedups.html |date=20070105162940 }} (rubychan.de)</ref> 而Antonio Cangiano 給出的評分顯示，平均起來YARV比原來的解譯器要快3倍。<ref>{{cite web | url=http://antoniocangiano.com/2007/12/03/the-great-ruby-shootout/ | title=The Great Ruby Shootout | date=2007-03-12 | last=Cangiano | first=Antonio | accessdate=2008-02-01 | archive-date=2012-02-23 | archive-url=https://www.webcitation.org/65etwmYdr?url=http://programmingzen.com/2007/12/03/the-great-ruby-shootout/ | dead-url=no }}</ref> 兩個評分給出的都是綜合性的結果。

據報導，在YARV上執行的Ruby on Rails 比在1.8.6上執行要快15%<ref>{{cite web
|url = http://eigenclass.org/hiki/non-synthetic-benchmarks-for-yarv
|title = Rails on 1.9: first benchmarks, YARV exposed to non-synthetic tests
|quote = ''When benchmarking basic requests with a minimalistic schema (only one int column), even though YARV serviced requests 15% faster, it took much longer to load the environment (50% slower). This comes as no surprise since plain old (evil) eval is slower in YARV(...)In fact, the mere fact of requiring active_record (and indirectly ActiveSupport) causes a sharp decrease in performance.''
|publisher = eigenclass.org
|date = 2007-03-28
|accessdate = 2008-09-13
|deadurl = yes
|archiveurl = https://web.archive.org/web/20081218094241/http://eigenclass.org/hiki/non-synthetic-benchmarks-for-yarv
|archivedate = 2008-12-18
}}</ref>。然而，啟動和ActiveRecord功能反而變慢了。

== 歷史 ==
在2007年1月1日，YARV首次出現在Ruby下個版本的CVS庫之中。<ref name=SOG1>[http://blog.grayproductions.net/articles/the_ruby_vm_episode_i The Ruby VM: Episode I] {{Webarchive|url=https://archive.today/20120526203024/http://blog.grayproductions.net/articles/the_ruby_vm_episode_i |date=2012-05-26 }} - ''Shades of Gray''</ref>
後来，Ruby的創造者[[松本行弘]]把YARV完全放入Ruby 1.9.0（於2007年12月26日發布）<ref name="ruby191">[http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/284720 merge YARV] {{Wayback|url=http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/284720 |date=20120904001606 }} announcement by Koichi Sasada</ref> 。從這個版本起，YARV成为了官方的Ruby解释器，取代原本由[[松本行弘]]製作的版本。

== 另见 ==
* [[Parrot虚拟机]]
* [[Ruby]]
* [[Rubinius]]

== 引用 ==
{{reflist}}

== 外部链接 ==
* [http://www.atdot.net/yarv/ YARV home page] {{Wayback|url=http://www.atdot.net/yarv/ |date=20140925235753 }} Note: obsolete now that YARV is merged into Ruby
* [http://www.atdot.net/yarv/rc2006_sasada_yarv_on_rails.pdf YARV: Yet Another RubyVM ... on Rails?] {{Wayback|url=http://www.atdot.net/yarv/rc2006_sasada_yarv_on_rails.pdf |date=20211104220221 }} - Koichi Sasada's RubyConf 2006 presentation
* [http://antoniocangiano.com/2008/12/09/the-great-ruby-shootout-december-2008/ The Great Ruby Shootout (December 2008)] {{Wayback|url=http://antoniocangiano.com/2008/12/09/the-great-ruby-shootout-december-2008/ |date=20081211005532 }} - Ruby 1.9.1 (YARV) versus other Ruby VMs
* [https://web.archive.org/web/20090218121038/http://shootout.alioth.debian.org/gp4/benchmark.php?test=all&lang=yarv YARV in The Computer Language Benchmarks Game] - Ruby 1.9.0(YARV) versus Ruby 1.8.6
* [https://web.archive.org/web/20101204223835/http://shootout.alioth.debian.org/u32/benchmark.php?test=all&lang=yarv&lang2=ruby YARV in The Computer Language Benchmarks Game] - Ruby 1.9.1 versus Ruby 1.8.7

{{Ruby编程语言}}

[[Category:Ruby]]

YARV - 版本历史

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