Duktape
Embeddable Javascript engine with a focus on portability
...Property virtualization using a subset of ECMAScript ES2015 Proxy object. Bytecode dump/load for caching compiled functions. Distributable includes an optional logging framework, CommonJS-based module loading implementations, CBOR bindings, etc. See duktape.org for packaged end-user downloads and documentation. The end user downloads are also available from the duktape-releases repo as both binaries and in unpacked form as git tags.