NDLI: Optimization of dynamic languages using hierarchical layering of virtual machines

Content Provider	ACM Digital Library
Author	Yermolovich, Alexander Franz, Michael Wimmer, Christian
Abstract	Creating an interpreter is a simple and fast way to implement a dynamic programming language. With this ease also come major drawbacks. Interpreters are significantly slower than compiled machine code because they have a high dispatch overhead and cannot perform optimizations. To overcome these limitations, interpreters are commonly combined with just-in-time compilers to improve the overall performance. However, this means that a just-in-time compiler has to be implemented for each language. We explore the approach of taking an interpreter of a dynamic language and running it on top of an optimizing trace-based virtual machine, i.e., we run a guest VM on top of a host VM. The host VM uses trace recording to observe the guest VM executing the application program. Each recorded trace represents a sequence of guest VM bytecodes corresponding to a given execution path through the application program. The host VM optimizes and compiles these traces to machine code, thus eliminating the need for a custom just-in-time compiler for the guest VM. The guest VM only needs to provide basic information about its interpreter loop to the host VM.
Starting Page	79
Ending Page	88
Page Count	10
File Format	PDF
ISSN	03621340 15581160
DOI	10.1145/1837513.1640147
Journal	ACM SIGPLAN Notices (SIGP)
Volume Number	44
Issue Number	12
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1983-05-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Lua Actionscript Dynamic languages Hierarchical virtual machines Trace compilation
Content Type	Text
Resource Type	Article
Subject	Computer Graphics and Computer-Aided Design Software

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