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IonMonkey is the next generation JavaScript JIT for SpiderMonkey. It is a whole-method JIT with the ability to perform type specialization. It has two goals: a cleanly engineered design that makes future optimization work possible, and excellent performance. | IonMonkey is the next generation JavaScript JIT compiler for SpiderMonkey. It is a whole-method JIT with the ability to perform type specialization. It has two goals: a cleanly engineered design that makes future optimization work possible, and excellent performance. | ||
=Planning= | =Planning= | ||
Revision as of 19:19, 7 November 2011
IonMonkey is the next generation JavaScript JIT compiler for SpiderMonkey. It is a whole-method JIT with the ability to perform type specialization. It has two goals: a cleanly engineered design that makes future optimization work possible, and excellent performance.
Planning
See Platform/Features/IonMonkey for IonMonkey's planning page.
Design
See IonMonkey/Overview for an overview of the IonMonkey architecture and its files.
Development
- Source code: http://hg.mozilla.org/projects/ionmonkey
- TBPL: http://tbpl.mozilla.org/?tree=Ionmonkey
To get started, see the Build Documentation for SpiderMonkey. Use the '-h' shell option to see all of IonMonkey's options.
Currently, IonMonkey is disabled by default. Use '--ion' to enable it.
Debugging
A few tools exist to help debug IonMonkey.
- Debug spew, controlled by the environment variable IONFLAGS. Set it to help to see available options.
- Instruction spew, via setting the environment variable JMFLAGS to insns.
- c1visualizer IonMonkey writes a spew file to /tmp/ion.cfg, which can be imported into the c1visualizer. It can display a clickable control-flow graph, MIR, LIR, and liveness intervals for LSRA.
- iongraph by Sean Stangl, using IonMonkey's JSON spew.