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SELF compiler customization doubled performance for a dynamic language

dl.acm.org Editor score 8/10

The compiler specializes procedures by receiver type, predicts likely types with runtime checks, and combines the approach with inlining and other optimizations; the abstract reports doubled performance. The techniques offer a concrete reference for optimizing dynamic-language runtimes.

What
The SELF compiler customizes procedures for dynamically typed object-oriented programs to improve their performance.
Method
It predicts likely types, checks them at runtime, and compiles specialized procedure copies for different receiver types and control paths.
Why it matters
The techniques show how runtime checks and specialization can recover performance when programs lack static type information.
verify predic… split calls compile receiver type run-time typetests control path a copy of agiven procedure
SELF uses predicted receiver types and runtime checks to select specialized procedure copies. Sketched from the article's own text.

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