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MagLev (software)

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Ruby interpreter

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MagLev

Developer	GemTalk Systems
Initial release	2008; 17 years ago (2008)

Stable release	1.2.0 Alpha 4 / May 17, 2013 (2013-05-17)

Repository	github.com/MagLev/maglev
Written in	Smalltalk,Ruby
Operating system	Cross-platform:Solaris,AIX,Linux,Mac OS X
Platform	GemStone/S
Type	Ruby programming language interpreter
License	MIT,GPL, others^[1]
Website	maglev.github.io

MagLev is an alternative implementation of theRuby programming language built on theGemStone/S virtual machine fromGemTalk Systems. Much of Maglev was set out to be written in Ruby as much as possible, resulting in some collaboration with the Rubinius project. As of the first beta release, the project runs RubyGems 1.3.5 natively, with support forC andSmalltalk extensions. MagLev has a distinct VM architecture that allows it to share code and data between runtimes and execution cycles through a Ruby API.^[2]

Architecture

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Maglev runs inside an image likeSmalltalk, offering transparent object persistence^[3]^{[failed verification]}^[4] to Ruby objects and classes. Object persistence is based onACID transactions that allow multiple running instances to see a shared object graph. Maglev uses a process-basedconcurrency model, mapping Rubythreads to Smalltalk Processes^[5]^{[self-published source?]}, which arescheduled in theVM asgreen threads. Using MagLev should yield performance increases when using Ruby, along with allowing Ruby processes over multiple machines to use the same objects at the same time.^[6]