Nashorn: implementing a dynamic language runtime on JVM in 2014

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" summary

Nashorn compiles JavaScript to JVM bytecode, uses invoke dynamic, and ships as ECMAScript 5.1 in OpenJDK; it passes the 11,500‑test suite. It implements on-stack replacement and optimistic typing: it generates type-specialized variants (int/long/double/object), lazily compiles per-parameter shapes, deoptimizes by throwing and catching a rewrite exception, and synthesizes continuations to resume execution. Concrete results: large speedups over Rhino and big gains in number‑crunching workloads; the project aims to become a reusable dynamic‑language toolkit for the JVM.

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" chapters (10)

1. 0:00Introduction to Nashorn
2. 1:10Nashorn architecture
3. 4:40Performance and goals
4. 8:05Type specialized compilation
5. 18:11Arithmetic and property optimizations
6. 21:42On-stack replacement
7. 25:18De-optimization mechanism
8. 29:32Type inference and lattice
9. 34:26Static type analysis
10. 40:51Future goals and library

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